51365620444 has 24 divisors (see below), whose sum is σ = 92415018080. Its totient is φ = 24962769216.

The previous prime is 51365620441. The next prime is 51365620447. The reversal of 51365620444 is 44402656315.

It is an interprime number because it is at equal distance from previous prime (51365620441) and next prime (51365620447).

It is a junction number, because it is equal to n+sod(n) for n = 51365620397 and 51365620406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51365620441) 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, 36339 + ... + 322570.

Almost surely, 2^51365620444 is an apocalyptic number.

It is an amenable number.

51365620444 is a deficient number, since it is larger than the sum of its proper divisors (41049397636).

51365620444 is a wasteful number, since it uses less digits than its factorization.

51365620444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 359917 (or 359915 counting only the distinct ones).

The product of its (nonzero) digits is 345600, while the sum is 40.

The spelling of 51365620444 in words is "fifty-one billion, three hundred sixty-five million, six hundred twenty thousand, four hundred forty-four".