109691452809 has 27 divisors (see below), whose sum is σ = 161566674087. Its totient is φ = 71713424016.

The previous prime is 109691452807. The next prime is 109691452811. The reversal of 109691452809 is 908254196901.

The square root of 109691452809 is 331197.

It is a perfect power (a square), and thus also a powerful number.

109691452809 is a `hidden beast` number, since 10 + 96 + 9 + 14 + 528 + 0 + 9 = 666.

It is an interprime number because it is at equal distance from previous prime (109691452807) and next prime (109691452811).

It can be written as a sum of positive squares in only one way, i.e., 79076252025 + 30615200784 = 281205^2 + 174972^2 .

It is not a de Polignac number, because 109691452809 - 2¹ = 109691452807 is a prime.

It is a super-3 number, since 3×109691452809³ (a number of 34 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (109691452807) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 52659282 + ... + 52661364.

Almost surely, 2^109691452809 is an apocalyptic number.

109691452809 is the 331197-th square number.

109691452809 is the 165599-th centered octagonal number.

It is an amenable number.

109691452809 is a deficient number, since it is larger than the sum of its proper divisors (51875221278).

109691452809 is an frugal number, since it uses more digits than its factorization.

109691452809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4278 (or 2139 counting only the distinct ones).

The product of its (nonzero) digits is 1399680, while the sum is 54.

It can be divided in two parts, 109691 and 452809, that added together give a square (562500 = 750²).

The spelling of 109691452809 in words is "one hundred nine billion, six hundred ninety-one million, four hundred fifty-two thousand, eight hundred nine".