54688661690 has 32 divisors (see below), whose sum is σ = 106033124736. Its totient is φ = 20188687680.

The previous prime is 54688661689. The next prime is 54688661707. The reversal of 54688661690 is 9616688645.

It is a super-2 number, since 2×54688661690² (a number of 22 digits) contains 22 as substring.

It is a Curzon 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, 652475 + ... + 731505.

It is an arithmetic number, because the mean of its divisors is an integer number (3313535148).

Almost surely, 2^54688661690 is an apocalyptic number.

54688661690 is a deficient number, since it is larger than the sum of its proper divisors (51344463046).

54688661690 is a wasteful number, since it uses less digits than its factorization.

54688661690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84374.

The product of its (nonzero) digits is 14929920, while the sum is 59.

The spelling of 54688661690 in words is "fifty-four billion, six hundred eighty-eight million, six hundred sixty-one thousand, six hundred ninety".