51515066610555 has 16 divisors (see below), whose sum is σ = 87272583434784. Its totient is φ = 25858543239680.

The previous prime is 51515066610541. The next prime is 51515066610559. The reversal of 51515066610555 is 55501666051515.

It is not a de Polignac number, because 51515066610555 - 2⁹ = 51515066610043 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a junction number, because it is equal to n+sod(n) for n = 51515066610498 and 51515066610507.

It is not an unprimeable number, because it can be changed into a prime (51515066610559) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 101009934276 + ... + 101009934785.

It is an arithmetic number, because the mean of its divisors is an integer number (5454536464674).

Almost surely, 2^{51515066610555} is an apocalyptic number.

51515066610555 is a deficient number, since it is larger than the sum of its proper divisors (35757516824229).

51515066610555 is a wasteful number, since it uses less digits than its factorization.

51515066610555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 202019869086.

The product of its (nonzero) digits is 3375000, while the sum is 51.

The spelling of 51515066610555 in words is "fifty-one trillion, five hundred fifteen billion, sixty-six million, six hundred ten thousand, five hundred fifty-five".