51553385544 has 32 divisors (see below), whose sum is σ = 128891016000. Its totient is φ = 17183454912.

The previous prime is 51553385531. The next prime is 51553385591. The reversal of 51553385544 is 44558335515.

It is a super-2 number, since 2×51553385544² (a number of 22 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 51553385493 and 51553385502.

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, 435862 + ... + 541370.

It is an arithmetic number, because the mean of its divisors is an integer number (4027844250).

Almost surely, 2^51553385544 is an apocalyptic number.

It is an amenable number.

51553385544 is an abundant number, since it is smaller than the sum of its proper divisors (77337630456).

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

51553385544 is a wasteful number, since it uses less digits than its factorization.

51553385544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125877 (or 125873 counting only the distinct ones).

The product of its digits is 3600000, while the sum is 48.

The spelling of 51553385544 in words is "fifty-one billion, five hundred fifty-three million, three hundred eighty-five thousand, five hundred forty-four".