69681991581808 has 80 divisors (see below), whose sum is σ = 140060335564800. Its totient is φ = 33559048373760.

The previous prime is 69681991581733. The next prime is 69681991581857. The reversal of 69681991581808 is 80818519918696.

It is a Harshad number since it is a multiple of its sum of digits (79).

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 1448093973 + ... + 1448142091.

It is an arithmetic number, because the mean of its divisors is an integer number (1750754194560).

Almost surely, 2^{69681991581808} is an apocalyptic number.

It is an amenable number.

69681991581808 is an abundant number, since it is smaller than the sum of its proper divisors (70378343982992).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

69681991581808 is a wasteful number, since it uses less digits than its factorization.

69681991581808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76190 (or 76184 counting only the distinct ones).

The product of its (nonzero) digits is 537477120, while the sum is 79.

The spelling of 69681991581808 in words is "sixty-nine trillion, six hundred eighty-one billion, nine hundred ninety-one million, five hundred eighty-one thousand, eight hundred eight".