51022418440 has 64 divisors (see below), whose sum is σ = 131264991360. Its totient is φ = 17484802560.

The previous prime is 51022418413. The next prime is 51022418441. The reversal of 51022418440 is 4481422015.

It is not an unprimeable number, because it can be changed into a prime (51022418441) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 539500 + ... + 626980.

It is an arithmetic number, because the mean of its divisors is an integer number (2051015490).

Almost surely, 2^51022418440 is an apocalyptic number.

It is an amenable number.

51022418440 is an abundant number, since it is smaller than the sum of its proper divisors (80242572920).

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

51022418440 is a wasteful number, since it uses less digits than its factorization.

51022418440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89582 (or 89578 counting only the distinct ones).

The product of its (nonzero) digits is 10240, while the sum is 31.

The spelling of 51022418440 in words is "fifty-one billion, twenty-two million, four hundred eighteen thousand, four hundred forty".