51850005815 has 16 divisors (see below), whose sum is σ = 65088748800. Its totient is φ = 39599653632.

The previous prime is 51850005709. The next prime is 51850005821.

It is a happy number.

51850005815 is nontrivially palindromic in base 10.

It is a cyclic number.

It is not a de Polignac number, because 51850005815 - 2¹² = 51850001719 is a prime.

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, 1996007 + ... + 2021816.

It is an arithmetic number, because the mean of its divisors is an integer number (4068046800).

Almost surely, 2^51850005815 is an apocalyptic number.

51850005815 is a deficient number, since it is larger than the sum of its proper divisors (13238742985).

51850005815 is a wasteful number, since it uses less digits than its factorization.

51850005815 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4017946.

The product of its (nonzero) digits is 40000, while the sum is 38.

The spelling of 51850005815 in words is "fifty-one billion, eight hundred fifty million, five thousand, eight hundred fifteen".