89912688661 has 8 divisors (see below), whose sum is σ = 90346103064. Its totient is φ = 89480079360.

The previous prime is 89912688647. The next prime is 89912688707. The reversal of 89912688661 is 16688621998.

It can be written as a sum of positive squares in 4 ways, for example, as 48375803025 + 41536885636 = 219945^2 + 203806^2 .

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 89912688661 - 2⁹ = 89912688149 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 89912688593 and 89912688602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (89912688461) 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, 23221 + ... + 424693.

It is an arithmetic number, because the mean of its divisors is an integer number (11293262883).

Almost surely, 2^89912688661 is an apocalyptic number.

It is an amenable number.

89912688661 is a deficient number, since it is larger than the sum of its proper divisors (433414403).

89912688661 is a wasteful number, since it uses less digits than its factorization.

89912688661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 402551.

The product of its digits is 17915904, while the sum is 64.

The spelling of 89912688661 in words is "eighty-nine billion, nine hundred twelve million, six hundred eighty-eight thousand, six hundred sixty-one".