90397156864 has 240 divisors, whose sum is σ = 224647559136. Its totient is φ = 36143923200.

The previous prime is 90397156847. The next prime is 90397156877. The reversal of 90397156864 is 46865179309.

It is a junction number, because it is equal to n+sod(n) for n = 90397156799 and 90397156808.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 23656074 + ... + 23659894.

Almost surely, 2^90397156864 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 90397156864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (112323779568).

90397156864 is an abundant number, since it is smaller than the sum of its proper divisors (134250402272).

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

90397156864 is a wasteful number, since it uses less digits than its factorization.

90397156864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3917 (or 3894 counting only the distinct ones).

The product of its (nonzero) digits is 9797760, while the sum is 58.

The spelling of 90397156864 in words is "ninety billion, three hundred ninety-seven million, one hundred fifty-six thousand, eight hundred sixty-four".