51553550511 has 24 divisors (see below), whose sum is σ = 78344199024. Its totient is φ = 32624519040.

The previous prime is 51553550501. The next prime is 51553550519. The reversal of 51553550511 is 11505535515.

51553550511 is a `hidden beast` number, since 5 + 1 + 5 + 53 + 550 + 51 + 1 = 666.

It is not a de Polignac number, because 51553550511 - 2¹⁷ = 51553419439 is a prime.

It is a super-2 number, since 2×51553550511² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51553550519) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1874341 + ... + 1901646.

It is an arithmetic number, because the mean of its divisors is an integer number (3264341626).

Almost surely, 2^51553550511 is an apocalyptic number.

51553550511 is a deficient number, since it is larger than the sum of its proper divisors (26790648513).

51553550511 is a wasteful number, since it uses less digits than its factorization.

51553550511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3776071 (or 3776068 counting only the distinct ones).

The product of its (nonzero) digits is 46875, while the sum is 36.

The spelling of 51553550511 in words is "fifty-one billion, five hundred fifty-three million, five hundred fifty thousand, five hundred eleven".