90993957288 has 64 divisors (see below), whose sum is σ = 245099850240. Its totient is φ = 27984870144.

The previous prime is 90993957287. The next prime is 90993957289. The reversal of 90993957288 is 88275939909.

It is an interprime number because it is at equal distance from previous prime (90993957287) and next prime (90993957289).

It is not an unprimeable number, because it can be changed into a prime (90993957283) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 600570 + ... + 736662.

It is an arithmetic number, because the mean of its divisors is an integer number (3829685160).

Almost surely, 2^90993957288 is an apocalyptic number.

It is an amenable number.

90993957288 is an abundant number, since it is smaller than the sum of its proper divisors (154105892952).

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

90993957288 is a wasteful number, since it uses less digits than its factorization.

90993957288 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138258 (or 138254 counting only the distinct ones).

The product of its (nonzero) digits is 88179840, while the sum is 69.

The spelling of 90993957288 in words is "ninety billion, nine hundred ninety-three million, nine hundred fifty-seven thousand, two hundred eighty-eight".