51361630544 has 40 divisors (see below), whose sum is σ = 113815358208. Its totient is φ = 21995475840.

The previous prime is 51361630519. The next prime is 51361630571. The reversal of 51361630544 is 44503616315.

It is a junction number, because it is equal to n+sod(n) for n = 51361630498 and 51361630507.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24167 + ... + 321414.

Almost surely, 2^51361630544 is an apocalyptic number.

It is an amenable number.

51361630544 is an abundant number, since it is smaller than the sum of its proper divisors (62453727664).

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

51361630544 is a wasteful number, since it uses less digits than its factorization.

51361630544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 346923 (or 346917 counting only the distinct ones).

The product of its (nonzero) digits is 129600, while the sum is 38.

The spelling of 51361630544 in words is "fifty-one billion, three hundred sixty-one million, six hundred thirty thousand, five hundred forty-four".