51654645615 has 16 divisors (see below), whose sum is σ = 84206819808. Its totient is φ = 27029348736.

The previous prime is 51654645577. The next prime is 51654645629.

51654645615 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 51654645615 - 2¹⁷ = 51654514543 is a prime.

It is a super-2 number, since 2×51654645615² (a number of 22 digits) contains 22 as substring.

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, 32486404 + ... + 32487993.

It is an arithmetic number, because the mean of its divisors is an integer number (5262926238).

Almost surely, 2^51654645615 is an apocalyptic number.

51654645615 is a deficient number, since it is larger than the sum of its proper divisors (32552174193).

51654645615 is a wasteful number, since it uses less digits than its factorization.

51654645615 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64974458.

The product of its digits is 2160000, while the sum is 48.

The spelling of 51654645615 in words is "fifty-one billion, six hundred fifty-four million, six hundred forty-five thousand, six hundred fifteen".