642610222406 has 16 divisors (see below), whose sum is σ = 1021936608864. Its totient is φ = 302013588864.

The previous prime is 642610222393. The next prime is 642610222409. The reversal of 642610222406 is 604222016246.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (642610222409) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12199010 + ... + 12251573.

It is an arithmetic number, because the mean of its divisors is an integer number (63871038054).

Almost surely, 2^642610222406 is an apocalyptic number.

642610222406 is a deficient number, since it is larger than the sum of its proper divisors (379326386458).

642610222406 is a wasteful number, since it uses less digits than its factorization.

642610222406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24451375.

The product of its (nonzero) digits is 55296, while the sum is 35.

The spelling of 642610222406 in words is "six hundred forty-two billion, six hundred ten million, two hundred twenty-two thousand, four hundred six".