51378438434676 has 48 divisors (see below), whose sum is σ = 120085948382400. Its totient is φ = 17097161075712.

The previous prime is 51378438434657. The next prime is 51378438434717. The reversal of 51378438434676 is 67643483487315.

It is a super-2 number, since 2×51378438434676² (a number of 28 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 51378438434676.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 98599396 + ... + 99119108.

It is an arithmetic number, because the mean of its divisors is an integer number (2501790591300).

Almost surely, 2^{51378438434676} is an apocalyptic number.

It is an amenable number.

51378438434676 is an abundant number, since it is smaller than the sum of its proper divisors (68707509947724).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51378438434676 is a wasteful number, since it uses less digits than its factorization.

51378438434676 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 533648 (or 533646 counting only the distinct ones).

The product of its digits is 975421440, while the sum is 69.

The spelling of 51378438434676 in words is "fifty-one trillion, three hundred seventy-eight billion, four hundred thirty-eight million, four hundred thirty-four thousand, six hundred seventy-six".