51736816225 has 6 divisors (see below), whose sum is σ = 64153652150. Its totient is φ = 41389452960.

The previous prime is 51736816223. The next prime is 51736816249. The reversal of 51736816225 is 52261863715.

It can be written as a sum of positive squares in 3 ways, for example, as 5820469264 + 45916346961 = 76292^2 + 214281^2 .

It is not a de Polignac number, because 51736816225 - 2¹ = 51736816223 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51736816223) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1034736300 + ... + 1034736349.

Almost surely, 2^51736816225 is an apocalyptic number.

It is an amenable number.

51736816225 is a deficient number, since it is larger than the sum of its proper divisors (12416835925).

51736816225 is a wasteful number, since it uses less digits than its factorization.

51736816225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2069472659 (or 2069472654 counting only the distinct ones).

The product of its digits is 604800, while the sum is 46.

The spelling of 51736816225 in words is "fifty-one billion, seven hundred thirty-six million, eight hundred sixteen thousand, two hundred twenty-five".