51235773625 has 8 divisors (see below), whose sum is σ = 63942245640. Its totient is φ = 40988618800.

The previous prime is 51235773623. The next prime is 51235773653. The reversal of 51235773625 is 52637753215.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 3724416784 + 47511356841 = 61028^2 + 217971^2 .

It is not a de Polignac number, because 51235773625 - 2¹ = 51235773623 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51235773623) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 204942970 + ... + 204943219.

It is an arithmetic number, because the mean of its divisors is an integer number (7992780705).

Almost surely, 2^51235773625 is an apocalyptic number.

It is an amenable number.

51235773625 is a deficient number, since it is larger than the sum of its proper divisors (12706472015).

51235773625 is an equidigital number, since it uses as much as digits as its factorization.

51235773625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 409886204 (or 409886194 counting only the distinct ones).

The product of its digits is 1323000, while the sum is 46.

The spelling of 51235773625 in words is "fifty-one billion, two hundred thirty-five million, seven hundred seventy-three thousand, six hundred twenty-five".