51913429793 has 2 divisors, whose sum is σ = 51913429794. Its totient is φ = 51913429792.

The previous prime is 51913429681. The next prime is 51913429807. The reversal of 51913429793 is 39792431915.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 46028698849 + 5884730944 = 214543^2 + 76712^2 .

It is a cyclic number.

It is not a de Polignac number, because 51913429793 - 2²⁰ = 51912381217 is a prime.

It is not a weakly prime, because it can be changed into another prime (51913429093) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25956714896 + 25956714897.

It is an arithmetic number, because the mean of its divisors is an integer number (25956714897).

Almost surely, 2^51913429793 is an apocalyptic number.

It is an amenable number.

51913429793 is a deficient number, since it is larger than the sum of its proper divisors (1).

51913429793 is an equidigital number, since it uses as much as digits as its factorization.

51913429793 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1837080, while the sum is 53.

The spelling of 51913429793 in words is "fifty-one billion, nine hundred thirteen million, four hundred twenty-nine thousand, seven hundred ninety-three".