54777631639 has 2 divisors, whose sum is σ = 54777631640. Its totient is φ = 54777631638.

The previous prime is 54777631633. The next prime is 54777631729. The reversal of 54777631639 is 93613677745.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 54777631639 - 2³ = 54777631631 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (54777631631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27388815819 + 27388815820.

It is an arithmetic number, because the mean of its divisors is an integer number (27388815820).

Almost surely, 2^54777631639 is an apocalyptic number.

54777631639 is a deficient number, since it is larger than the sum of its proper divisors (1).

54777631639 is an equidigital number, since it uses as much as digits as its factorization.

54777631639 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20003760, while the sum is 58.

The spelling of 54777631639 in words is "fifty-four billion, seven hundred seventy-seven million, six hundred thirty-one thousand, six hundred thirty-nine".