51511001601105 has 16 divisors (see below), whose sum is σ = 91575113957760. Its totient is φ = 27472534187184.

The previous prime is 51511001601097. The next prime is 51511001601229. The reversal of 51511001601105 is 50110610011515.

51511001601105 is a `hidden beast` number, since 5 + 1 + 51 + 1 + 0 + 0 + 1 + 601 + 1 + 0 + 5 = 666.

It is not a de Polignac number, because 51511001601105 - 2³ = 51511001601097 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 190781487277 + ... + 190781487546.

It is an arithmetic number, because the mean of its divisors is an integer number (5723444622360).

Almost surely, 2^{51511001601105} is an apocalyptic number.

It is an amenable number.

51511001601105 is a deficient number, since it is larger than the sum of its proper divisors (40064112356655).

51511001601105 is a wasteful number, since it uses less digits than its factorization.

51511001601105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 381562974837 (or 381562974831 counting only the distinct ones).

The product of its (nonzero) digits is 750, while the sum is 27.

The spelling of 51511001601105 in words is "fifty-one trillion, five hundred eleven billion, one million, six hundred one thousand, one hundred five".