642306642505 has 16 divisors (see below), whose sum is σ = 841164004800. Its totient is φ = 466950871360.

The previous prime is 642306642473. The next prime is 642306642521. The reversal of 642306642505 is 505246603246.

It is not a de Polignac number, because 642306642505 - 2⁵ = 642306642473 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2122270 + ... + 2405959.

It is an arithmetic number, because the mean of its divisors is an integer number (52572750300).

Almost surely, 2^642306642505 is an apocalyptic number.

It is an amenable number.

642306642505 is a deficient number, since it is larger than the sum of its proper divisors (198857362295).

642306642505 is a wasteful number, since it uses less digits than its factorization.

642306642505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4530824.

The product of its (nonzero) digits is 1036800, while the sum is 43.

The spelling of 642306642505 in words is "six hundred forty-two billion, three hundred six million, six hundred forty-two thousand, five hundred five".