51973459940 has 96 divisors (see below), whose sum is σ = 116475408000. Its totient is φ = 19424351232.

The previous prime is 51973459891. The next prime is 51973459943. The reversal of 51973459940 is 4995437915.

51973459940 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (51973459943) 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, 14980526 + ... + 14983994.

It is an arithmetic number, because the mean of its divisors is an integer number (1213285500).

Almost surely, 2^51973459940 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 51973459940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (58237704000).

51973459940 is an abundant number, since it is smaller than the sum of its proper divisors (64501948060).

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

51973459940 is a wasteful number, since it uses less digits than its factorization.

51973459940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4029 (or 4027 counting only the distinct ones).

The product of its (nonzero) digits is 6123600, while the sum is 56.

The spelling of 51973459940 in words is "fifty-one billion, nine hundred seventy-three million, four hundred fifty-nine thousand, nine hundred forty".