51645564608806 has 32 divisors (see below), whose sum is σ = 88865146681920. Its totient is φ = 22051415033856.

The previous prime is 51645564608797. The next prime is 51645564608809. The reversal of 51645564608806 is 60880646554615.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51645564608809) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5158000 + ... + 11397196.

It is an arithmetic number, because the mean of its divisors is an integer number (2777035833810).

Almost surely, 2^{51645564608806} is an apocalyptic number.

51645564608806 is a deficient number, since it is larger than the sum of its proper divisors (37219582073114).

51645564608806 is a wasteful number, since it uses less digits than its factorization.

51645564608806 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6241408.

The product of its (nonzero) digits is 165888000, while the sum is 64.

The spelling of 51645564608806 in words is "fifty-one trillion, six hundred forty-five billion, five hundred sixty-four million, six hundred eight thousand, eight hundred six".