51977654709 has 64 divisors (see below), whose sum is σ = 75835146240. Its totient is φ = 31582172160.

The previous prime is 51977654693. The next prime is 51977654719. The reversal of 51977654709 is 90745677915.

It is not a de Polignac number, because 51977654709 - 2⁴ = 51977654693 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51977654719) 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, 54886174 + ... + 54887120.

It is an arithmetic number, because the mean of its divisors is an integer number (1184924160).

Almost surely, 2^51977654709 is an apocalyptic number.

It is an amenable number.

51977654709 is a deficient number, since it is larger than the sum of its proper divisors (23857491531).

51977654709 is a wasteful number, since it uses less digits than its factorization.

51977654709 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1490.

The product of its (nonzero) digits is 16669800, while the sum is 60.

The spelling of 51977654709 in words is "fifty-one billion, nine hundred seventy-seven million, six hundred fifty-four thousand, seven hundred nine".