89918668497 has 32 divisors (see below), whose sum is σ = 145766559744. Its totient is φ = 48130387200.

The previous prime is 89918668439. The next prime is 89918668507. The reversal of 89918668497 is 79486681998.

It is not a de Polignac number, because 89918668497 - 2⁷ = 89918668369 is a prime.

It is not an unprimeable number, because it can be changed into a prime (89918668297) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 521529 + ... + 672182.

It is an arithmetic number, because the mean of its divisors is an integer number (4555204992).

Almost surely, 2^89918668497 is an apocalyptic number.

It is an amenable number.

89918668497 is a deficient number, since it is larger than the sum of its proper divisors (55847891247).

89918668497 is a wasteful number, since it uses less digits than its factorization.

89918668497 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1193949.

The product of its digits is 376233984, while the sum is 75.

The spelling of 89918668497 in words is "eighty-nine billion, nine hundred eighteen million, six hundred sixty-eight thousand, four hundred ninety-seven".