89658831661 has 4 divisors (see below), whose sum is σ = 102467236192. Its totient is φ = 76850427132.

The previous prime is 89658831659. The next prime is 89658831671. The reversal of 89658831661 is 16613885698.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 89658831661 - 2¹ = 89658831659 is a prime.

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 89658831661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (89658831631) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6404202255 + ... + 6404202268.

It is an arithmetic number, because the mean of its divisors is an integer number (25616809048).

Almost surely, 2^89658831661 is an apocalyptic number.

It is an amenable number.

89658831661 is a deficient number, since it is larger than the sum of its proper divisors (12808404531).

89658831661 is a wasteful number, since it uses less digits than its factorization.

89658831661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12808404530.

The product of its digits is 14929920, while the sum is 61.

The spelling of 89658831661 in words is "eighty-nine billion, six hundred fifty-eight million, eight hundred thirty-one thousand, six hundred sixty-one".