642022665998 has 16 divisors (see below), whose sum is σ = 1100727335904. Its totient is φ = 275123308320.

The previous prime is 642022665983. The next prime is 642022666013. The reversal of 642022665998 is 899566220246.

It is an interprime number because it is at equal distance from previous prime (642022665983) and next prime (642022666013).

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, 2301965 + ... + 2565752.

It is an arithmetic number, because the mean of its divisors is an integer number (68795458494).

Almost surely, 2^642022665998 is an apocalyptic number.

642022665998 is a deficient number, since it is larger than the sum of its proper divisors (458704669906).

642022665998 is a wasteful number, since it uses less digits than its factorization.

642022665998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4877147.

The product of its (nonzero) digits is 22394880, while the sum is 59.

The spelling of 642022665998 in words is "six hundred forty-two billion, twenty-two million, six hundred sixty-five thousand, nine hundred ninety-eight".