51685614840212 has 24 divisors (see below), whose sum is σ = 92216620655712. Its totient is φ = 25338645914400.

The previous prime is 51685614840199. The next prime is 51685614840239. The reversal of 51685614840212 is 21204841658615.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (53).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 79296614 + ... + 79945757.

It is an arithmetic number, because the mean of its divisors is an integer number (3842359193988).

Almost surely, 2^{51685614840212} is an apocalyptic number.

It is an amenable number.

51685614840212 is a deficient number, since it is larger than the sum of its proper divisors (40531005815500).

51685614840212 is a wasteful number, since it uses less digits than its factorization.

51685614840212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159243959 (or 159243957 counting only the distinct ones).

The product of its (nonzero) digits is 3686400, while the sum is 53.

The spelling of 51685614840212 in words is "fifty-one trillion, six hundred eighty-five billion, six hundred fourteen million, eight hundred forty thousand, two hundred twelve".