51156561715 has 8 divisors (see below), whose sum is σ = 70157570400. Its totient is φ = 35078785152.

The previous prime is 51156561679. The next prime is 51156561763. The reversal of 51156561715 is 51716565115.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 51156561715 - 2⁷ = 51156561587 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 730807990 + ... + 730808059.

It is an arithmetic number, because the mean of its divisors is an integer number (8769696300).

Almost surely, 2^51156561715 is an apocalyptic number.

51156561715 is a deficient number, since it is larger than the sum of its proper divisors (19001008685).

51156561715 is a wasteful number, since it uses less digits than its factorization.

51156561715 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1461616061.

The product of its digits is 157500, while the sum is 43.

The spelling of 51156561715 in words is "fifty-one billion, one hundred fifty-six million, five hundred sixty-one thousand, seven hundred fifteen".