51440620051 has 4 divisors (see below), whose sum is σ = 51441140704. Its totient is φ = 51440099400.

The previous prime is 51440620003. The next prime is 51440620109. The reversal of 51440620051 is 15002604415.

51440620051 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 51440620051 - 2⁹ = 51440619539 is a prime.

It is a super-2 number, since 2×51440620051² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51440626051) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 61515 + ... + 326596.

It is an arithmetic number, because the mean of its divisors is an integer number (12860285176).

Almost surely, 2^51440620051 is an apocalyptic number.

51440620051 is a deficient number, since it is larger than the sum of its proper divisors (520653).

51440620051 is a wasteful number, since it uses less digits than its factorization.

51440620051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 520652.

The product of its (nonzero) digits is 4800, while the sum is 28.

The spelling of 51440620051 in words is "fifty-one billion, four hundred forty million, six hundred twenty thousand, fifty-one".