51335550331645 has 16 divisors (see below), whose sum is σ = 61700733259200. Its totient is φ = 41003109633024.

The previous prime is 51335550331613. The next prime is 51335550331757. The reversal of 51335550331645 is 54613305553315.

It is a cyclic number.

It is not a de Polignac number, because 51335550331645 - 2⁵ = 51335550331613 is a prime.

It is a congruent 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, 4809181 + ... + 11216029.

It is an arithmetic number, because the mean of its divisors is an integer number (3856295828700).

Almost surely, 2^{51335550331645} is an apocalyptic number.

It is an amenable number.

51335550331645 is a deficient number, since it is larger than the sum of its proper divisors (10365182927555).

51335550331645 is a wasteful number, since it uses less digits than its factorization.

51335550331645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6409404.

The product of its (nonzero) digits is 6075000, while the sum is 49.

The spelling of 51335550331645 in words is "fifty-one trillion, three hundred thirty-five billion, five hundred fifty million, three hundred thirty-one thousand, six hundred forty-five".