51369777 has 6 divisors (see below), whose sum is σ = 74200802. Its totient is φ = 34246512.

The previous prime is 51369763. The next prime is 51369781. The reversal of 51369777 is 77796315.

51369777 is a `hidden beast` number, since 513 + 69 + 7 + 77 = 666.

It can be written as a sum of positive squares in only one way, i.e., 39425841 + 11943936 = 6279^2 + 3456^2 .

It is not a de Polignac number, because 51369777 - 2¹⁶ = 51304241 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51369757) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2853868 + ... + 2853885.

Almost surely, 2^51369777 is an apocalyptic number.

It is an amenable number.

51369777 is a deficient number, since it is larger than the sum of its proper divisors (22831025).

51369777 is a wasteful number, since it uses less digits than its factorization.

51369777 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5707759 (or 5707756 counting only the distinct ones).

The product of its digits is 277830, while the sum is 45.

The square root of 51369777 is about 7167.2712380654. The cubic root of 51369777 is about 371.7370887715.

The spelling of 51369777 in words is "fifty-one million, three hundred sixty-nine thousand, seven hundred seventy-seven".