90531558720756 has 18 divisors (see below), whose sum is σ = 228843662322002. Its totient is φ = 30177186240240.

The previous prime is 90531558720689. The next prime is 90531558720809. The reversal of 90531558720756 is 65702785513509.

90531558720756 is a `hidden beast` number, since 9 + 0 + 5 + 3 + 1 + 558 + 7 + 2 + 0 + 75 + 6 = 666.

It can be written as a sum of positive squares in only one way, i.e., 46911266672400 + 43620292048356 = 6849180^2 + 6604566^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a junction number, because it is equal to n+sod(n) for n = 90531558720693 and 90531558720702.

It is a congruent number.

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, 1257382759975 + ... + 1257382760046.

Almost surely, 2^{90531558720756} is an apocalyptic number.

It is an amenable number.

90531558720756 is an abundant number, since it is smaller than the sum of its proper divisors (138312103601246).

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

90531558720756 is a wasteful number, since it uses less digits than its factorization.

90531558720756 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2514765520031 (or 2514765520026 counting only the distinct ones).

The product of its (nonzero) digits is 79380000, while the sum is 63.

The spelling of 90531558720756 in words is "ninety trillion, five hundred thirty-one billion, five hundred fifty-eight million, seven hundred twenty thousand, seven hundred fifty-six".