51455655515 has 8 divisors (see below), whose sum is σ = 67360130928. Its totient is φ = 37422294880.

The previous prime is 51455655497. The next prime is 51455655527. The reversal of 51455655515 is 51555655415.

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

It is not a de Polignac number, because 51455655515 - 2¹² = 51455651419 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 51455655515.

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, 467778632 + ... + 467778741.

It is an arithmetic number, because the mean of its divisors is an integer number (8420016366).

Almost surely, 2^51455655515 is an apocalyptic number.

51455655515 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

51455655515 is a deficient number, since it is larger than the sum of its proper divisors (15904475413).

51455655515 is a wasteful number, since it uses less digits than its factorization.

51455655515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 935557389.

The product of its digits is 1875000, while the sum is 47.

The spelling of 51455655515 in words is "fifty-one billion, four hundred fifty-five million, six hundred fifty-five thousand, five hundred fifteen".