51665505155155 has 8 divisors (see below), whose sum is σ = 61999066099152. Its totient is φ = 41332097515488.

The previous prime is 51665505155107. The next prime is 51665505155191. The reversal of 51665505155155 is 55155150556615.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 51665505155155 - 2⁹ = 51665505154643 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 51665505155096 and 51665505155105.

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, 37583344 + ... + 38933773.

It is an arithmetic number, because the mean of its divisors is an integer number (7749883262394).

Almost surely, 2^{51665505155155} is an apocalyptic number.

51665505155155 is a deficient number, since it is larger than the sum of its proper divisors (10333560943997).

51665505155155 is a wasteful number, since it uses less digits than its factorization.

51665505155155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76652165.

The product of its (nonzero) digits is 14062500, while the sum is 55.

The spelling of 51665505155155 in words is "fifty-one trillion, six hundred sixty-five billion, five hundred five million, one hundred fifty-five thousand, one hundred fifty-five".