51256277555 has 8 divisors (see below), whose sum is σ = 70294323552. Its totient is φ = 35147161728.

The previous prime is 51256277543. The next prime is 51256277557. The reversal of 51256277555 is 55577265215.

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

It is not a de Polignac number, because 51256277555 - 2⁸ = 51256277299 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51256277557) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 732232502 + ... + 732232571.

It is an arithmetic number, because the mean of its divisors is an integer number (8786790444).

Almost surely, 2^51256277555 is an apocalyptic number.

51256277555 is a deficient number, since it is larger than the sum of its proper divisors (19038045997).

51256277555 is a wasteful number, since it uses less digits than its factorization.

51256277555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1464465085.

The product of its digits is 3675000, while the sum is 50.

The spelling of 51256277555 in words is "fifty-one billion, two hundred fifty-six million, two hundred seventy-seven thousand, five hundred fifty-five".