51654640315 has 16 divisors (see below), whose sum is σ = 64623845088. Its totient is φ = 39601126656.

The previous prime is 51654640237. The next prime is 51654640337. The reversal of 51654640315 is 51304645615.

It is a happy number.

51654640315 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 51654640315 - 2¹⁹ = 51654116027 is a prime.

It is a Duffinian 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, 2255154 + ... + 2277943.

It is an arithmetic number, because the mean of its divisors is an integer number (4038990318).

Almost surely, 2^51654640315 is an apocalyptic number.

51654640315 is a deficient number, since it is larger than the sum of its proper divisors (12969204773).

51654640315 is a wasteful number, since it uses less digits than its factorization.

51654640315 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4533198.

The product of its (nonzero) digits is 216000, while the sum is 40.

The spelling of 51654640315 in words is "fifty-one billion, six hundred fifty-four million, six hundred forty thousand, three hundred fifteen".