51840413312 has 16 divisors (see below), whose sum is σ = 103275823650. Its totient is φ = 25920206592.

The previous prime is 51840413293. The next prime is 51840413323. The reversal of 51840413312 is 21331404815.

It can be written as a sum of positive squares in only one way, i.e., 51282319936 + 558093376 = 226456^2 + 23624^2 .

It is a tau number, because it is divible by the number of its divisors (16).

It is a Harshad number since it is a multiple of its sum of digits (32).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 202501487 + ... + 202501742.

Almost surely, 2^51840413312 is an apocalyptic number.

It is an amenable number.

51840413312 is a deficient number, since it is larger than the sum of its proper divisors (51435410338).

51840413312 is an equidigital number, since it uses as much as digits as its factorization.

51840413312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 405003243 (or 405003231 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 32.

The spelling of 51840413312 in words is "fifty-one billion, eight hundred forty million, four hundred thirteen thousand, three hundred twelve".