42170878025 has 6 divisors (see below), whose sum is σ = 52291888782. Its totient is φ = 33736702400.

The previous prime is 42170878021. The next prime is 42170878031. The reversal of 42170878025 is 52087807124.

It can be written as a sum of positive squares in 3 ways, for example, as 29767936 + 42141110089 = 5456^2 + 205283^2 .

It is not a de Polignac number, because 42170878025 - 2² = 42170878021 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42170878021) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 843417536 + ... + 843417585.

It is an arithmetic number, because the mean of its divisors is an integer number (8715314797).

Almost surely, 2^42170878025 is an apocalyptic number.

It is an amenable number.

42170878025 is a deficient number, since it is larger than the sum of its proper divisors (10121010757).

42170878025 is a wasteful number, since it uses less digits than its factorization.

42170878025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1686835131 (or 1686835126 counting only the distinct ones).

The product of its (nonzero) digits is 250880, while the sum is 44.

The spelling of 42170878025 in words is "forty-two billion, one hundred seventy million, eight hundred seventy-eight thousand, twenty-five".