51399708733 has 4 divisors (see below), whose sum is σ = 51422667520. Its totient is φ = 51376749948.

The previous prime is 51399708683. The next prime is 51399708757. The reversal of 51399708733 is 33780799315.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 51399708733 - 2⁹ = 51399708221 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51399705733) 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, 11476035 + ... + 11480512.

It is an arithmetic number, because the mean of its divisors is an integer number (12855666880).

Almost surely, 2^51399708733 is an apocalyptic number.

It is an amenable number.

51399708733 is a deficient number, since it is larger than the sum of its proper divisors (22958787).

51399708733 is a wasteful number, since it uses less digits than its factorization.

51399708733 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22958786.

The product of its (nonzero) digits is 4286520, while the sum is 55.

The spelling of 51399708733 in words is "fifty-one billion, three hundred ninety-nine million, seven hundred eight thousand, seven hundred thirty-three".