109919434681 has 9 divisors (see below), whose sum is σ = 127868164581. Its totient is φ = 94214669052.

The previous prime is 109919434663. The next prime is 109919434687. The reversal of 109919434681 is 186434919901.

The square root of 109919434681 is 331541.

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

It is not a de Polignac number, because 109919434681 - 2²⁵ = 109885880249 is a prime.

It is a super-2 number, since 2×109919434681² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (109919434687) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 2297106 + ... + 2344468.

Almost surely, 2^109919434681 is an apocalyptic number.

109919434681 is the 331541-st square number.

109919434681 is the 165771-st centered octagonal number.

It is an amenable number.

109919434681 is a deficient number, since it is larger than the sum of its proper divisors (17948729900).

109919434681 is an frugal number, since it uses more digits than its factorization.

109919434681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94740 (or 47370 counting only the distinct ones).

The product of its (nonzero) digits is 1679616, while the sum is 55.

The spelling of 109919434681 in words is "one hundred nine billion, nine hundred nineteen million, four hundred thirty-four thousand, six hundred eighty-one".