51345027739 has 16 divisors (see below), whose sum is σ = 54496890880. Its totient is φ = 48238454880.

The previous prime is 51345027731. The next prime is 51345027743. The reversal of 51345027739 is 93772054315.

It is a cyclic number.

It is not a de Polignac number, because 51345027739 - 2³ = 51345027731 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51345027731) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9482797 + ... + 9488209.

It is an arithmetic number, because the mean of its divisors is an integer number (3406055680).

Almost surely, 2^51345027739 is an apocalyptic number.

51345027739 is a deficient number, since it is larger than the sum of its proper divisors (3151863141).

51345027739 is a wasteful number, since it uses less digits than its factorization.

51345027739 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9490.

The product of its (nonzero) digits is 793800, while the sum is 46.

The spelling of 51345027739 in words is "fifty-one billion, three hundred forty-five million, twenty-seven thousand, seven hundred thirty-nine".