100690078489 has 81 divisors (see below), whose sum is σ = 139851869661. Its totient is φ = 72195963840.

The previous prime is 100690078487. The next prime is 100690078547. The reversal of 100690078489 is 984870096001.

It is a happy number.

The square root of 100690078489 is 317317.

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

It can be written as a sum of positive squares in 4 ways, for example, as 65391184089 + 35298894400 = 255717^2 + 187880^2 .

It is not a de Polignac number, because 100690078489 - 2¹ = 100690078487 is a prime.

It is a super-2 number, since 2×100690078489² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (100690078483) 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 80 ways as a sum of consecutive naturals, for example, 317634159 + ... + 317634475.

Almost surely, 2^100690078489 is an apocalyptic number.

100690078489 is the 317317-th square number.

100690078489 is the 158659-th centered octagonal number.

It is an amenable number.

100690078489 is a deficient number, since it is larger than the sum of its proper divisors (39161791172).

100690078489 is an equidigital number, since it uses as much as digits as its factorization.

100690078489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 696 (or 348 counting only the distinct ones).

The product of its (nonzero) digits is 870912, while the sum is 52.

The spelling of 100690078489 in words is "one hundred billion, six hundred ninety million, seventy-eight thousand, four hundred eighty-nine".