51613351555 has 8 divisors (see below), whose sum is σ = 62171521632. Its totient is φ = 41133681408.

The previous prime is 51613351511. The next prime is 51613351567. The reversal of 51613351555 is 55515331615.

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 51613351555 - 2¹¹ = 51613349507 is a prime.

It is a Duffinian number.

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, 19623534 + ... + 19626163.

It is an arithmetic number, because the mean of its divisors is an integer number (7771440204).

Almost surely, 2^51613351555 is an apocalyptic number.

51613351555 is a deficient number, since it is larger than the sum of its proper divisors (10558170077).

51613351555 is a wasteful number, since it uses less digits than its factorization.

51613351555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39249965.

The product of its digits is 168750, while the sum is 40.

The spelling of 51613351555 in words is "fifty-one billion, six hundred thirteen million, three hundred fifty-one thousand, five hundred fifty-five".