51751776630 has 64 divisors (see below), whose sum is σ = 125351981568. Its totient is φ = 13673287680.

The previous prime is 51751776617. The next prime is 51751776647. The reversal of 51751776630 is 3667715715.

It is a happy number.

It is a super-2 number, since 2×51751776630² (a number of 22 digits) contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 51751776630.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2532534 + ... + 2552886.

It is an arithmetic number, because the mean of its divisors is an integer number (1958624712).

Almost surely, 2^51751776630 is an apocalyptic number.

51751776630 is an abundant number, since it is smaller than the sum of its proper divisors (73600204938).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51751776630 is a wasteful number, since it uses less digits than its factorization.

51751776630 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21141.

The product of its (nonzero) digits is 926100, while the sum is 48.

The spelling of 51751776630 in words is "fifty-one billion, seven hundred fifty-one million, seven hundred seventy-six thousand, six hundred thirty".