642246272757 has 8 divisors (see below), whose sum is σ = 951475959680. Its totient is φ = 428164181820.

The previous prime is 642246272743. The next prime is 642246272779. The reversal of 642246272757 is 757272642246.

642246272757 is a `hidden beast` number, since 6 + 4 + 2 + 2 + 4 + 627 + 2 + 7 + 5 + 7 = 666.

It is not a de Polignac number, because 642246272757 - 2¹² = 642246268661 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (642246272557) 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, 11893449469 + ... + 11893449522.

It is an arithmetic number, because the mean of its divisors is an integer number (118934494960).

Almost surely, 2^642246272757 is an apocalyptic number.

It is an amenable number.

642246272757 is a deficient number, since it is larger than the sum of its proper divisors (309229686923).

642246272757 is a wasteful number, since it uses less digits than its factorization.

642246272757 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23786899000 (or 23786898994 counting only the distinct ones).

The product of its digits is 15805440, while the sum is 54.

The spelling of 642246272757 in words is "six hundred forty-two billion, two hundred forty-six million, two hundred seventy-two thousand, seven hundred fifty-seven".