51605617627 has 4 divisors (see below), whose sum is σ = 51610196200. Its totient is φ = 51601039056.

The previous prime is 51605617589. The next prime is 51605617699. The reversal of 51605617627 is 72671650615.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51605617627 is a prime.

It is a super-2 number, since 2×51605617627² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51605627627) 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, 2272338 + ... + 2294935.

It is an arithmetic number, because the mean of its divisors is an integer number (12902549050).

Almost surely, 2^51605617627 is an apocalyptic number.

51605617627 is a deficient number, since it is larger than the sum of its proper divisors (4578573).

51605617627 is a wasteful number, since it uses less digits than its factorization.

51605617627 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4578572.

The product of its (nonzero) digits is 529200, while the sum is 46.

The spelling of 51605617627 in words is "fifty-one billion, six hundred five million, six hundred seventeen thousand, six hundred twenty-seven".