51378438434677 has 16 divisors (see below), whose sum is σ = 51769654057152. Its totient is φ = 50988859608960.

The previous prime is 51378438434657. The next prime is 51378438434717. The reversal of 51378438434677 is 77643483487315.

It is a cyclic number.

It is not a de Polignac number, because 51378438434677 - 2¹⁹ = 51378437910389 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51378438434657) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 182542818 + ... + 182824060.

It is an arithmetic number, because the mean of its divisors is an integer number (3235603378572).

Almost surely, 2^{51378438434677} is an apocalyptic number.

It is an amenable number.

51378438434677 is a deficient number, since it is larger than the sum of its proper divisors (391215622475).

51378438434677 is a wasteful number, since it uses less digits than its factorization.

51378438434677 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 284148.

The product of its digits is 1137991680, while the sum is 70.

The spelling of 51378438434677 in words is "fifty-one trillion, three hundred seventy-eight billion, four hundred thirty-eight million, four hundred thirty-four thousand, six hundred seventy-seven".