89998646565 has 32 divisors (see below), whose sum is σ = 144913691520. Its totient is φ = 47694407936.

The previous prime is 89998646537. The next prime is 89998646567. The reversal of 89998646565 is 56564689998.

It is a cyclic number.

It is not a de Polignac number, because 89998646565 - 2¹⁷ = 89998515493 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (89998646567) 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 31 ways as a sum of consecutive naturals, for example, 3674299 + ... + 3698711.

It is an arithmetic number, because the mean of its divisors is an integer number (4528552860).

Almost surely, 2^89998646565 is an apocalyptic number.

It is an amenable number.

89998646565 is a deficient number, since it is larger than the sum of its proper divisors (54915044955).

89998646565 is a wasteful number, since it uses less digits than its factorization.

89998646565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25973.

The product of its digits is 1007769600, while the sum is 75.

The spelling of 89998646565 in words is "eighty-nine billion, nine hundred ninety-eight million, six hundred forty-six thousand, five hundred sixty-five".