90778923258320 has 160 divisors (see below), whose sum is σ = 233507864254464. Its totient is φ = 32543271129600.

The previous prime is 90778923258293. The next prime is 90778923258341. The reversal of 90778923258320 is 2385232987709.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1052307509 + ... + 1052393771.

Almost surely, 2^{90778923258320} 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 90778923258320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (116753932127232).

90778923258320 is an abundant number, since it is smaller than the sum of its proper divisors (142728940996144).

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

90778923258320 is a wasteful number, since it uses less digits than its factorization.

90778923258320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103201 (or 103195 counting only the distinct ones).

The product of its (nonzero) digits is 91445760, while the sum is 65.

The spelling of 90778923258320 in words is "ninety trillion, seven hundred seventy-eight billion, nine hundred twenty-three million, two hundred fifty-eight thousand, three hundred twenty".