51306627380 has 24 divisors (see below), whose sum is σ = 107749361832. Its totient is φ = 20521613952.

The previous prime is 51306627377. The next prime is 51306627439. The reversal of 51306627380 is 8372660315.

It can be written as a sum of positive squares in 4 ways, for example, as 65966884 + 51240660496 = 8122^2 + 226364^2 .

It is a super-2 number, since 2×51306627380² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 434834 + ... + 540086.

It is an arithmetic number, because the mean of its divisors is an integer number (4489556743).

Almost surely, 2^51306627380 is an apocalyptic number.

It is an amenable number.

51306627380 is an abundant number, since it is smaller than the sum of its proper divisors (56442734452).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51306627380 is a wasteful number, since it uses less digits than its factorization.

51306627380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129635 (or 129633 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 41.

The spelling of 51306627380 in words is "fifty-one billion, three hundred six million, six hundred twenty-seven thousand, three hundred eighty".