51070628440 has 64 divisors (see below), whose sum is σ = 123936674400. Its totient is φ = 18828106752.

The previous prime is 51070628417. The next prime is 51070628449. The reversal of 51070628440 is 4482607015.

51070628440 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 51070628440.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51070628449) 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, 268164 + ... + 417196.

Almost surely, 2^51070628440 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51070628440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (61968337200).

51070628440 is an abundant number, since it is smaller than the sum of its proper divisors (72866045960).

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

51070628440 is a wasteful number, since it uses less digits than its factorization.

51070628440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149716 (or 149712 counting only the distinct ones).

The product of its (nonzero) digits is 53760, while the sum is 37.

The spelling of 51070628440 in words is "fifty-one billion, seventy million, six hundred twenty-eight thousand, four hundred forty".