51777077715 has 64 divisors (see below), whose sum is σ = 100867092480. Its totient is φ = 24991303680.

The previous prime is 51777077699. The next prime is 51777077719.

51777077715 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 51777077715 - 2⁴ = 51777077699 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51777077719) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 252979 + ... + 409331.

It is an arithmetic number, because the mean of its divisors is an integer number (1576048320).

Almost surely, 2^51777077715 is an apocalyptic number.

51777077715 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

51777077715 is a deficient number, since it is larger than the sum of its proper divisors (49090014765).

51777077715 is a wasteful number, since it uses less digits than its factorization.

51777077715 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156601 (or 156595 counting only the distinct ones).

The product of its (nonzero) digits is 2941225, while the sum is 54.

The spelling of 51777077715 in words is "fifty-one billion, seven hundred seventy-seven million, seventy-seven thousand, seven hundred fifteen".