51345545016845 has 32 divisors (see below), whose sum is σ = 62030491372800. Its totient is φ = 40799951976960.

The previous prime is 51345545016841. The next prime is 51345545016847. The reversal of 51345545016845 is 54861054554315.

It is not a de Polignac number, because 51345545016845 - 2² = 51345545016841 is a prime.

It is a super-2 number, since 2×51345545016845² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51345545016841) 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, 3419153777 + ... + 3419168793.

It is an arithmetic number, because the mean of its divisors is an integer number (1938452855400).

Almost surely, 2^{51345545016845} is an apocalyptic number.

It is an amenable number.

51345545016845 is a deficient number, since it is larger than the sum of its proper divisors (10684946355955).

51345545016845 is a wasteful number, since it uses less digits than its factorization.

51345545016845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20885.

The product of its (nonzero) digits is 28800000, while the sum is 56.

The spelling of 51345545016845 in words is "fifty-one trillion, three hundred forty-five billion, five hundred forty-five million, sixteen thousand, eight hundred forty-five".