89557649431 has 2 divisors, whose sum is σ = 89557649432. Its totient is φ = 89557649430.

The previous prime is 89557649411. The next prime is 89557649471. The reversal of 89557649431 is 13494675598.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 89557649431 - 2¹⁷ = 89557518359 is a prime.

It is a super-2 number, since 2×89557649431² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 89557649431.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (89557649411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44778824715 + 44778824716.

It is an arithmetic number, because the mean of its divisors is an integer number (44778824716).

Almost surely, 2^89557649431 is an apocalyptic number.

89557649431 is a deficient number, since it is larger than the sum of its proper divisors (1).

89557649431 is an equidigital number, since it uses as much as digits as its factorization.

89557649431 is an evil number, because the sum of its binary digits is even.

The product of its digits is 32659200, while the sum is 61.

The spelling of 89557649431 in words is "eighty-nine billion, five hundred fifty-seven million, six hundred forty-nine thousand, four hundred thirty-one".