642020022646 has 16 divisors (see below), whose sum is σ = 966743845200. Its totient is φ = 319772405088.

The previous prime is 642020022629. The next prime is 642020022661. The reversal of 642020022646 is 646220020246.

642020022646 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3995485 + ... + 4153063.

It is an arithmetic number, because the mean of its divisors is an integer number (60421490325).

Almost surely, 2^642020022646 is an apocalyptic number.

642020022646 is a deficient number, since it is larger than the sum of its proper divisors (324723822554).

642020022646 is a wasteful number, since it uses less digits than its factorization.

642020022646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165423.

The product of its (nonzero) digits is 55296, while the sum is 34.

The spelling of 642020022646 in words is "six hundred forty-two billion, twenty million, twenty-two thousand, six hundred forty-six".