51645617112655 has 64 divisors (see below), whose sum is σ = 67755893078016. Its totient is φ = 37637832960000.

The previous prime is 51645617112623. The next prime is 51645617112673. The reversal of 51645617112655 is 55621171654615.

It is not a de Polignac number, because 51645617112655 - 2⁵ = 51645617112623 is a prime.

It is a super-2 number, since 2×51645617112655² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 51645617112596 and 51645617112605.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 335565370 + ... + 335719240.

It is an arithmetic number, because the mean of its divisors is an integer number (1058685829344).

Almost surely, 2^{51645617112655} is an apocalyptic number.

51645617112655 is a deficient number, since it is larger than the sum of its proper divisors (16110275965361).

51645617112655 is a wasteful number, since it uses less digits than its factorization.

51645617112655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154768.

The product of its digits is 7560000, while the sum is 55.

The spelling of 51645617112655 in words is "fifty-one trillion, six hundred forty-five billion, six hundred seventeen million, one hundred twelve thousand, six hundred fifty-five".