642648846245 has 32 divisors (see below), whose sum is σ = 888742713600. Its totient is φ = 436985510400.

The previous prime is 642648846227. The next prime is 642648846277. The reversal of 642648846245 is 542648846246.

It is not a de Polignac number, because 642648846245 - 2⁸ = 642648845989 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3031694 + ... + 3236736.

It is an arithmetic number, because the mean of its divisors is an integer number (27773209800).

Almost surely, 2^642648846245 is an apocalyptic number.

It is an amenable number.

642648846245 is a deficient number, since it is larger than the sum of its proper divisors (246093867355).

642648846245 is a wasteful number, since it uses less digits than its factorization.

642648846245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 205805.

The product of its digits is 70778880, while the sum is 59.

Subtracting from 642648846245 its reverse (542648846246), we obtain a palindrome (99999999999).

The spelling of 642648846245 in words is "six hundred forty-two billion, six hundred forty-eight million, eight hundred forty-six thousand, two hundred forty-five".