89661781864 has 32 divisors (see below), whose sum is σ = 174644352000. Its totient is φ = 43108378560.

The previous prime is 89661781829. The next prime is 89661781877. The reversal of 89661781864 is 46818716698.

It is a junction number, because it is equal to n+sod(n) for n = 89661781796 and 89661781805.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1112464 + ... + 1190335.

It is an arithmetic number, because the mean of its divisors is an integer number (5457636000).

Almost surely, 2^89661781864 is an apocalyptic number.

It is an amenable number.

89661781864 is a deficient number, since it is larger than the sum of its proper divisors (84982570136).

89661781864 is a wasteful number, since it uses less digits than its factorization.

89661781864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2302993 (or 2302989 counting only the distinct ones).

The product of its digits is 27869184, while the sum is 64.

The spelling of 89661781864 in words is "eighty-nine billion, six hundred sixty-one million, seven hundred eighty-one thousand, eight hundred sixty-four".