90689401512 has 24 divisors (see below), whose sum is σ = 245617129290. Its totient is φ = 30229800480.

The previous prime is 90689401501. The next prime is 90689401531. The reversal of 90689401512 is 21510498609.

90689401512 is a `hidden beast` number, since 90 + 6 + 8 + 9 + 40 + 1 + 512 = 666.

It can be written as a sum of positive squares in only one way, i.e., 90580533156 + 108868356 = 300966^2 + 10434^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is a super-2 number, since 2×90689401512² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 629787439 + ... + 629787582.

Almost surely, 2^90689401512 is an apocalyptic number.

It is an amenable number.

90689401512 is an abundant number, since it is smaller than the sum of its proper divisors (154927727778).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

90689401512 is a wasteful number, since it uses less digits than its factorization.

90689401512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1259575033 (or 1259575026 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 45.

The spelling of 90689401512 in words is "ninety billion, six hundred eighty-nine million, four hundred one thousand, five hundred twelve".