642075116371 has 4 divisors (see below), whose sum is σ = 691465509952. Its totient is φ = 592684722792.

The previous prime is 642075116281. The next prime is 642075116489. The reversal of 642075116371 is 173611570246.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-642075116371 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (642075116071) 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, 24695196771 + ... + 24695196796.

It is an arithmetic number, because the mean of its divisors is an integer number (172866377488).

Almost surely, 2^642075116371 is an apocalyptic number.

642075116371 is a deficient number, since it is larger than the sum of its proper divisors (49390393581).

642075116371 is a wasteful number, since it uses less digits than its factorization.

642075116371 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49390393580.

The product of its (nonzero) digits is 211680, while the sum is 43.

The spelling of 642075116371 in words is "six hundred forty-two billion, seventy-five million, one hundred sixteen thousand, three hundred seventy-one".