51539077893 has 32 divisors (see below), whose sum is σ = 73105225600. Its totient is φ = 32205517056.

The previous prime is 51539077883. The next prime is 51539077943. The reversal of 51539077893 is 39877093515.

It is not a de Polignac number, because 51539077893 - 2⁵ = 51539077861 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51539077853) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4548471 + ... + 4559787.

It is an arithmetic number, because the mean of its divisors is an integer number (2284538300).

Almost surely, 2^51539077893 is an apocalyptic number.

It is an amenable number.

51539077893 is a deficient number, since it is larger than the sum of its proper divisors (21566147707).

51539077893 is a wasteful number, since it uses less digits than its factorization.

51539077893 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12181.

The product of its (nonzero) digits is 7144200, while the sum is 57.

The spelling of 51539077893 in words is "fifty-one billion, five hundred thirty-nine million, seventy-seven thousand, eight hundred ninety-three".