642217627475 has 48 divisors (see below), whose sum is σ = 820704212640. Its totient is φ = 498161664000.

The previous prime is 642217627453. The next prime is 642217627477. The reversal of 642217627475 is 574726712246.

It is not a de Polignac number, because 642217627475 - 2³⁰ = 641143885651 is a prime.

It is not an unprimeable number, because it can be changed into a prime (642217627477) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 556996499 + ... + 556997651.

It is an arithmetic number, because the mean of its divisors is an integer number (17098004430).

Almost surely, 2^642217627475 is an apocalyptic number.

642217627475 is a deficient number, since it is larger than the sum of its proper divisors (178486585165).

642217627475 is a wasteful number, since it uses less digits than its factorization.

642217627475 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2760 (or 2755 counting only the distinct ones).

The product of its digits is 7902720, while the sum is 53.

The spelling of 642217627475 in words is "six hundred forty-two billion, two hundred seventeen million, six hundred twenty-seven thousand, four hundred seventy-five".