51155100000655 has 64 divisors (see below), whose sum is σ = 74141497497600. Its totient is φ = 33099557230080.

The previous prime is 51155100000649. The next prime is 51155100000659. The reversal of 51155100000655 is 55600000155115.

It is not a de Polignac number, because 51155100000655 - 2³ = 51155100000647 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 51155100000655.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51155100000659) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 739297110 + ... + 739366300.

It is an arithmetic number, because the mean of its divisors is an integer number (1158460898400).

Almost surely, 2^{51155100000655} is an apocalyptic number.

51155100000655 is a deficient number, since it is larger than the sum of its proper divisors (22986397496945).

51155100000655 is a wasteful number, since it uses less digits than its factorization.

51155100000655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73624.

The product of its (nonzero) digits is 18750, while the sum is 34.

The spelling of 51155100000655 in words is "fifty-one trillion, one hundred fifty-five billion, one hundred million, six hundred fifty-five", and thus it is an aban number.