51555055515 has 32 divisors (see below), whose sum is σ = 85454740800. Its totient is φ = 26509862400.

The previous prime is 51555055471. The next prime is 51555055561.

51555055515 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 51555055515 - 2⁶ = 51555055451 is a prime.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 220401 + ... + 389469.

It is an arithmetic number, because the mean of its divisors is an integer number (2670460650).

Almost surely, 2^51555055515 is an apocalyptic number.

51555055515 is a deficient number, since it is larger than the sum of its proper divisors (33899685285).

51555055515 is a wasteful number, since it uses less digits than its factorization.

51555055515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 169807.

The product of its (nonzero) digits is 390625, while the sum is 42.

The spelling of 51555055515 in words is "fifty-one billion, five hundred fifty-five million, fifty-five thousand, five hundred fifteen".