90708640902 has 48 divisors (see below), whose sum is σ = 227014147152. Its totient is φ = 25870556160.

The previous prime is 90708640879. The next prime is 90708640903. The reversal of 90708640902 is 20904680709.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90708640903) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13470883 + ... + 13477614.

It is an arithmetic number, because the mean of its divisors is an integer number (4729461399).

Almost surely, 2^90708640902 is an apocalyptic number.

90708640902 is an abundant number, since it is smaller than the sum of its proper divisors (136305506250).

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

90708640902 is a wasteful number, since it uses less digits than its factorization.

90708640902 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26948533 (or 26948530 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 45.

The spelling of 90708640902 in words is "ninety billion, seven hundred eight million, six hundred forty thousand, nine hundred two".