51020401044 has 24 divisors (see below), whose sum is σ = 119253940288. Its totient is φ = 16977323520.

The previous prime is 51020401039. The next prime is 51020401063. The reversal of 51020401044 is 44010402015.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 51020401044.

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, 3677392 + ... + 3691239.

Almost surely, 2^51020401044 is an apocalyptic number.

It is an amenable number.

51020401044 is an abundant number, since it is smaller than the sum of its proper divisors (68233539244).

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

51020401044 is a wasteful number, since it uses less digits than its factorization.

51020401044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7369215 (or 7369213 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 21.

Adding to 51020401044 its reverse (44010402015), we get a palindrome (95030803059).

The spelling of 51020401044 in words is "fifty-one billion, twenty million, four hundred one thousand, forty-four".