90708918531 has 96 divisors (see below), whose sum is σ = 155178565632. Its totient is φ = 46603045440.

The previous prime is 90708918491. The next prime is 90708918539. The reversal of 90708918531 is 13581980709.

It is not a de Polignac number, because 90708918531 - 2³⁵ = 56349180163 is a prime.

It is a super-2 number, since 2×90708918531² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (90708918539) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 100009380 + ... + 100010286.

It is an arithmetic number, because the mean of its divisors is an integer number (1616443392).

Almost surely, 2^90708918531 is an apocalyptic number.

90708918531 is a deficient number, since it is larger than the sum of its proper divisors (64469647101).

90708918531 is a wasteful number, since it uses less digits than its factorization.

90708918531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1549 (or 1542 counting only the distinct ones).

The product of its (nonzero) digits is 544320, while the sum is 51.

The spelling of 90708918531 in words is "ninety billion, seven hundred eight million, nine hundred eighteen thousand, five hundred thirty-one".