54667977991 has 32 divisors (see below), whose sum is σ = 62947971072. Its totient is φ = 47415060000.

The previous prime is 54667977967. The next prime is 54667978049. The reversal of 54667977991 is 19977976645.

It is not a de Polignac number, because 54667977991 - 2¹⁵ = 54667945223 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 54667977991.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (54667977391) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 2920201 + ... + 2938861.

It is an arithmetic number, because the mean of its divisors is an integer number (1967124096).

Almost surely, 2^54667977991 is an apocalyptic number.

54667977991 is a deficient number, since it is larger than the sum of its proper divisors (8279993081).

54667977991 is a wasteful number, since it uses less digits than its factorization.

54667977991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18796 (or 18774 counting only the distinct ones).

The product of its digits is 180033840, while the sum is 70.

The spelling of 54667977991 in words is "fifty-four billion, six hundred sixty-seven million, nine hundred seventy-seven thousand, nine hundred ninety-one".