90994518537 has 16 divisors (see below), whose sum is σ = 130667423040. Its totient is φ = 55992929472.

The previous prime is 90994518533. The next prime is 90994518547. The reversal of 90994518537 is 73581549909.

It is not a de Polignac number, because 90994518537 - 2² = 90994518533 is a prime.

It is not an unprimeable number, because it can be changed into a prime (90994518533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 595539 + ... + 732567.

It is an arithmetic number, because the mean of its divisors is an integer number (8166713940).

Almost surely, 2^90994518537 is an apocalyptic number.

It is an amenable number.

90994518537 is a deficient number, since it is larger than the sum of its proper divisors (39672904503).

90994518537 is a wasteful number, since it uses less digits than its factorization.

90994518537 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154072.

The product of its (nonzero) digits is 12247200, while the sum is 60.

The spelling of 90994518537 in words is "ninety billion, nine hundred ninety-four million, five hundred eighteen thousand, five hundred thirty-seven".