51644755634 has 64 divisors (see below), whose sum is σ = 86266736640. Its totient is φ = 23063927040.

The previous prime is 51644755607. The next prime is 51644755639. The reversal of 51644755634 is 43655744615.

It is not an unprimeable number, because it can be changed into a prime (51644755639) 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, 80318117 + ... + 80318759.

It is an arithmetic number, because the mean of its divisors is an integer number (1347917760).

Almost surely, 2^51644755634 is an apocalyptic number.

51644755634 is a deficient number, since it is larger than the sum of its proper divisors (34621981006).

51644755634 is a wasteful number, since it uses less digits than its factorization.

51644755634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1335.

The product of its digits is 6048000, while the sum is 50.

The spelling of 51644755634 in words is "fifty-one billion, six hundred forty-four million, seven hundred fifty-five thousand, six hundred thirty-four".