51127769977 has 16 divisors (see below), whose sum is σ = 55619903232. Its totient is φ = 46801601280.

The previous prime is 51127769969. The next prime is 51127769981. The reversal of 51127769977 is 77996772115.

It is a cyclic number.

It is not a de Polignac number, because 51127769977 - 2³ = 51127769969 is a prime.

It is a super-2 number, since 2×51127769977² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51127769677) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1773952 + ... + 1802542.

It is an arithmetic number, because the mean of its divisors is an integer number (3476243952).

Almost surely, 2^51127769977 is an apocalyptic number.

It is an amenable number.

51127769977 is a deficient number, since it is larger than the sum of its proper divisors (4492133255).

51127769977 is a wasteful number, since it uses less digits than its factorization.

51127769977 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31488.

The product of its digits is 11668860, while the sum is 61.

The spelling of 51127769977 in words is "fifty-one billion, one hundred twenty-seven million, seven hundred sixty-nine thousand, nine hundred seventy-seven".