51846566564815 has 16 divisors (see below), whose sum is σ = 67872078600480. Its totient is φ = 37706477397120.

The previous prime is 51846566564789. The next prime is 51846566564839.

51846566564815 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 51846566564815 - 2⁵ = 51846566564783 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, 19136257 + ... + 21676933.

It is an arithmetic number, because the mean of its divisors is an integer number (4242004912530).

Almost surely, 2^{51846566564815} is an apocalyptic number.

51846566564815 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

51846566564815 is a deficient number, since it is larger than the sum of its proper divisors (16025512035665).

51846566564815 is a wasteful number, since it uses less digits than its factorization.

51846566564815 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2911722.

The product of its digits is 829440000, while the sum is 70.

The spelling of 51846566564815 in words is "fifty-one trillion, eight hundred forty-six billion, five hundred sixty-six million, five hundred sixty-four thousand, eight hundred fifteen".