642859505958246 has 64 divisors (see below), whose sum is σ = 1330537889419200. Its totient is φ = 206822077894656.

The previous prime is 642859505958221. The next prime is 642859505958277.

642859505958246 is nontrivially palindromic in base 10.

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, 5693550840 + ... + 5693663748.

It is an arithmetic number, because the mean of its divisors is an integer number (20789654522175).

Almost surely, 2^{642859505958246} is an apocalyptic number.

642859505958246 is an abundant number, since it is smaller than the sum of its proper divisors (687678383460954).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

642859505958246 is a wasteful number, since it uses less digits than its factorization.

642859505958246 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124553.

The product of its (nonzero) digits is 7464960000, while the sum is 78.

The spelling of 642859505958246 in words is "six hundred forty-two trillion, eight hundred fifty-nine billion, five hundred five million, nine hundred fifty-eight thousand, two hundred forty-six".