5121371440 has 20 divisors (see below), whose sum is σ = 11907188784. Its totient is φ = 2048548544.

The previous prime is 5121371413. The next prime is 5121371443. The reversal of 5121371440 is 441731215.

It is a tau number, because it is divible by the number of its divisors (20).

It is a junction number, because it is equal to n+sod(n) for n = 5121371399 and 5121371408.

It is not an unprimeable number, because it can be changed into a prime (5121371443) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32008492 + ... + 32008651.

Almost surely, 2^5121371440 is an apocalyptic number.

It is an amenable number.

5121371440 is an abundant number, since it is smaller than the sum of its proper divisors (6785817344).

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

5121371440 is a wasteful number, since it uses less digits than its factorization.

5121371440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64017156 (or 64017150 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 28.

The square root of 5121371440 is about 71563.7578666744. The cubic root of 5121371440 is about 1723.7016277619.

The spelling of 5121371440 in words is "five billion, one hundred twenty-one million, three hundred seventy-one thousand, four hundred forty".