56439135897 has 16 divisors (see below), whose sum is σ = 78773760000. Its totient is φ = 35899491600.

The previous prime is 56439135889. The next prime is 56439135899. The reversal of 56439135897 is 79853193465.

It is not a de Polignac number, because 56439135897 - 2³ = 56439135889 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 56439135897.

It is not an unprimeable number, because it can be changed into a prime (56439135899) 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, 4267147 + ... + 4280352.

It is an arithmetic number, because the mean of its divisors is an integer number (4923360000).

Almost surely, 2^56439135897 is an apocalyptic number.

It is an amenable number.

56439135897 is a deficient number, since it is larger than the sum of its proper divisors (22334624103).

56439135897 is a wasteful number, since it uses less digits than its factorization.

56439135897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8547604.

The product of its digits is 24494400, while the sum is 60.

The spelling of 56439135897 in words is "fifty-six billion, four hundred thirty-nine million, one hundred thirty-five thousand, eight hundred ninety-seven".