51553976123 has 16 divisors (see below), whose sum is σ = 57477710976. Its totient is φ = 45937704960.

The previous prime is 51553976099. The next prime is 51553976147. The reversal of 51553976123 is 32167935515.

It is an interprime number because it is at equal distance from previous prime (51553976099) and next prime (51553976147).

It is a cyclic number.

It is not a de Polignac number, because 51553976123 - 2¹² = 51553972027 is a prime.

It is a super-2 number, since 2×51553976123² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (47).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51553976423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 533318 + ... + 622523.

It is an arithmetic number, because the mean of its divisors is an integer number (3592356936).

Almost surely, 2^51553976123 is an apocalyptic number.

51553976123 is a deficient number, since it is larger than the sum of its proper divisors (5923734853).

51553976123 is a wasteful number, since it uses less digits than its factorization.

51553976123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1155974.

The product of its digits is 850500, while the sum is 47.

The spelling of 51553976123 in words is "fifty-one billion, five hundred fifty-three million, nine hundred seventy-six thousand, one hundred twenty-three".