642116379 has 8 divisors (see below), whose sum is σ = 856752640. Its totient is φ = 427778856.

The previous prime is 642116353. The next prime is 642116383. The reversal of 642116379 is 973611246.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 642116379 - 2⁹ = 642115867 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (642116329) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 69619 + ... + 78300.

It is an arithmetic number, because the mean of its divisors is an integer number (107094080).

Almost surely, 2^642116379 is an apocalyptic number.

642116379 is a deficient number, since it is larger than the sum of its proper divisors (214636261).

642116379 is a wasteful number, since it uses less digits than its factorization.

642116379 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149369.

The product of its digits is 54432, while the sum is 39.

The square root of 642116379 is about 25340.0153709503. The cubic root of 642116379 is about 862.7227475937.

The spelling of 642116379 in words is "six hundred forty-two million, one hundred sixteen thousand, three hundred seventy-nine".