642887772737 has 16 divisors (see below), whose sum is σ = 738915096960. Its totient is φ = 547907683968.

The previous prime is 642887772731. The next prime is 642887772763. The reversal of 642887772737 is 737277788246.

It is a cyclic number.

It is not a de Polignac number, because 642887772737 - 2⁴ = 642887772721 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (642887772731) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14157533 + ... + 14202869.

It is an arithmetic number, because the mean of its divisors is an integer number (46182193560).

Almost surely, 2^642887772737 is an apocalyptic number.

It is an amenable number.

642887772737 is a deficient number, since it is larger than the sum of its proper divisors (96027324223).

642887772737 is a wasteful number, since it uses less digits than its factorization.

642887772737 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56840.

The product of its digits is 309786624, while the sum is 68.

The spelling of 642887772737 in words is "six hundred forty-two billion, eight hundred eighty-seven million, seven hundred seventy-two thousand, seven hundred thirty-seven".