90717756020 has 18 divisors (see below), whose sum is σ = 190510116342. Its totient is φ = 36286563616.

The previous prime is 90717755837. The next prime is 90717756067. The reversal of 90717756020 is 2065771709.

It can be written as a sum of positive squares in 3 ways, for example, as 16971836176 + 73745919844 = 130276^2 + 271562^2 .

It is a super-2 number, since 2×90717756020² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1313306 + ... + 1380654.

Almost surely, 2^90717756020 is an apocalyptic number.

It is an amenable number.

90717756020 is an abundant number, since it is smaller than the sum of its proper divisors (99792360322).

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

90717756020 is an frugal number, since it uses more digits than its factorization.

90717756020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134707 (or 67356 counting only the distinct ones).

The product of its (nonzero) digits is 185220, while the sum is 44.

The spelling of 90717756020 in words is "ninety billion, seven hundred seventeen million, seven hundred fifty-six thousand, twenty".