51274913140 has 96 divisors (see below), whose sum is σ = 118200176640. Its totient is φ = 18529305600.

The previous prime is 51274913089. The next prime is 51274913149. The reversal of 51274913140 is 4131947215.

It is a happy number.

51274913140 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 51274913140.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51274913149) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 30831949 + ... + 30833611.

It is an arithmetic number, because the mean of its divisors is an integer number (1231251840).

Almost surely, 2^51274913140 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 51274913140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (59100088320).

51274913140 is an abundant number, since it is smaller than the sum of its proper divisors (66925263500).

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

51274913140 is a wasteful number, since it uses less digits than its factorization.

51274913140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2473 (or 2471 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 37.

The spelling of 51274913140 in words is "fifty-one billion, two hundred seventy-four million, nine hundred thirteen thousand, one hundred forty".