51077442645 has 32 divisors (see below), whose sum is σ = 95583523200. Its totient is φ = 25807548672.

The previous prime is 51077442623. The next prime is 51077442673. The reversal of 51077442645 is 54624477015.

51077442645 is a `hidden beast` number, since 510 + 7 + 74 + 4 + 2 + 64 + 5 = 666.

It is not a de Polignac number, because 51077442645 - 2⁵ = 51077442613 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 51077442645.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9954052 + ... + 9959181.

It is an arithmetic number, because the mean of its divisors is an integer number (2986985100).

Almost surely, 2^51077442645 is an apocalyptic number.

It is an amenable number.

51077442645 is a deficient number, since it is larger than the sum of its proper divisors (44506080555).

51077442645 is a wasteful number, since it uses less digits than its factorization.

51077442645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19913266 (or 19913260 counting only the distinct ones).

The product of its (nonzero) digits is 940800, while the sum is 45.

The spelling of 51077442645 in words is "fifty-one billion, seventy-seven million, four hundred forty-two thousand, six hundred forty-five".