90631490557 has 8 divisors (see below), whose sum is σ = 92721343680. Its totient is φ = 88564230720.

The previous prime is 90631490473. The next prime is 90631490603. The reversal of 90631490557 is 75509413609.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 90631490557 - 2¹¹ = 90631488509 is a prime.

It is a super-3 number, since 3×90631490557³ (a number of 34 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 90631490557.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90631490657) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5640207 + ... + 5656252.

It is an arithmetic number, because the mean of its divisors is an integer number (11590167960).

Almost surely, 2^90631490557 is an apocalyptic number.

It is an amenable number.

90631490557 is a deficient number, since it is larger than the sum of its proper divisors (2089853123).

90631490557 is a wasteful number, since it uses less digits than its factorization.

90631490557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11296643.

The product of its (nonzero) digits is 1020600, while the sum is 49.

The spelling of 90631490557 in words is "ninety billion, six hundred thirty-one million, four hundred ninety thousand, five hundred fifty-seven".