51645644652635 has 32 divisors (see below), whose sum is σ = 69446775881664. Its totient is φ = 36539707392000.

The previous prime is 51645644652631. The next prime is 51645644652671. The reversal of 51645644652635 is 53625644654615.

51645644652635 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 51645644652635 - 2² = 51645644652631 is a prime.

It is a super-2 number, since 2×51645644652635² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51645644652631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11324315 + ... + 15216155.

It is an arithmetic number, because the mean of its divisors is an integer number (2170211746302).

Almost surely, 2^{51645644652635} is an apocalyptic number.

51645644652635 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

51645644652635 is a deficient number, since it is larger than the sum of its proper divisors (17801131229029).

51645644652635 is a wasteful number, since it uses less digits than its factorization.

51645644652635 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3898415.

The product of its digits is 311040000, while the sum is 62.

The spelling of 51645644652635 in words is "fifty-one trillion, six hundred forty-five billion, six hundred forty-four million, six hundred fifty-two thousand, six hundred thirty-five".