51004054645 has 16 divisors (see below), whose sum is σ = 63341426160. Its totient is φ = 39380027904.

The previous prime is 51004054579. The next prime is 51004054679. The reversal of 51004054645 is 54645040015.

It can be written as a sum of positive squares in 8 ways, for example, as 2395710916 + 48608343729 = 48946^2 + 220473^2 .

It is a cyclic number.

It is not a de Polignac number, because 51004054645 - 2²¹ = 51001957493 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 51004054645.

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, 287467 + ... + 429703.

It is an arithmetic number, because the mean of its divisors is an integer number (3958839135).

Almost surely, 2^51004054645 is an apocalyptic number.

It is an amenable number.

51004054645 is a deficient number, since it is larger than the sum of its proper divisors (12337371515).

51004054645 is a wasteful number, since it uses less digits than its factorization.

51004054645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144744.

The product of its (nonzero) digits is 48000, while the sum is 34.

The spelling of 51004054645 in words is "fifty-one billion, four million, fifty-four thousand, six hundred forty-five".