642116361 has 16 divisors (see below), whose sum is σ = 885063680. Its totient is φ = 413663760.

The previous prime is 642116353. The next prime is 642116383. The reversal of 642116361 is 163611246.

It is not a de Polignac number, because 642116361 - 2³ = 642116353 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (642116161) 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, 64056 + ... + 73398.

It is an arithmetic number, because the mean of its divisors is an integer number (55316480).

Almost surely, 2^642116361 is an apocalyptic number.

It is an amenable number.

642116361 is a deficient number, since it is larger than the sum of its proper divisors (242947319).

642116361 is a wasteful number, since it uses less digits than its factorization.

642116361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10116.

The product of its digits is 5184, while the sum is 30.

The square root of 642116361 is about 25340.0150157809. The cubic root of 642116361 is about 862.7227395323.

The spelling of 642116361 in words is "six hundred forty-two million, one hundred sixteen thousand, three hundred sixty-one".