51613171601 has 4 divisors (see below), whose sum is σ = 52124193204. Its totient is φ = 51102150000.

The previous prime is 51613171579. The next prime is 51613171667. The reversal of 51613171601 is 10617131615.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 36231219025 + 15381952576 = 190345^2 + 124024^2 .

It is a cyclic number.

It is not a de Polignac number, because 51613171601 - 2³⁰ = 50539429777 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51613171501) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 255510650 + ... + 255510851.

It is an arithmetic number, because the mean of its divisors is an integer number (13031048301).

Almost surely, 2^51613171601 is an apocalyptic number.

It is an amenable number.

51613171601 is a deficient number, since it is larger than the sum of its proper divisors (511021603).

51613171601 is a wasteful number, since it uses less digits than its factorization.

51613171601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 511021602.

The product of its (nonzero) digits is 3780, while the sum is 32.

The spelling of 51613171601 in words is "fifty-one billion, six hundred thirteen million, one hundred seventy-one thousand, six hundred one".