51776393656 has 32 divisors (see below), whose sum is σ = 104717516400. Its totient is φ = 23858161920.

The previous prime is 51776393633. The next prime is 51776393693. The reversal of 51776393656 is 65639367715.

It is a happy number.

It is a super-3 number, since 3×51776393656³ (a number of 33 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 51776393656.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 337765 + ... + 466516.

Almost surely, 2^51776393656 is an apocalyptic number.

It is an amenable number.

51776393656 is an abundant number, since it is smaller than the sum of its proper divisors (52941122744).

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

51776393656 is a wasteful number, since it uses less digits than its factorization.

51776393656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 804919 (or 804915 counting only the distinct ones).

The product of its digits is 21432600, while the sum is 58.

The spelling of 51776393656 in words is "fifty-one billion, seven hundred seventy-six million, three hundred ninety-three thousand, six hundred fifty-six".