51353371641 has 32 divisors (see below), whose sum is σ = 81459947520. Its totient is φ = 28365480000.

The previous prime is 51353371637. The next prime is 51353371661. The reversal of 51353371641 is 14617335315.

It is not a de Polignac number, because 51353371641 - 2² = 51353371637 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a self number, because there is not a number n which added to its sum of digits gives 51353371641.

It is not an unprimeable number, because it can be changed into a prime (51353371621) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 723735 + ... + 791516.

It is an arithmetic number, because the mean of its divisors is an integer number (2545623360).

Almost surely, 2^51353371641 is an apocalyptic number.

It is an amenable number.

51353371641 is a deficient number, since it is larger than the sum of its proper divisors (30106575879).

51353371641 is a wasteful number, since it uses less digits than its factorization.

51353371641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1515357.

The product of its digits is 113400, while the sum is 39.

The spelling of 51353371641 in words is "fifty-one billion, three hundred fifty-three million, three hundred seventy-one thousand, six hundred forty-one".