639719429022 has 16 divisors (see below), whose sum is σ = 1421598731280. Its totient is φ = 213239809656.

The previous prime is 639719429021. The next prime is 639719429039. The reversal of 639719429022 is 220924917936.

639719429022 is a `hidden beast` number, since 63 + 97 + 194 + 290 + 22 = 666.

It is a hoax number, since the sum of its digits (54) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (54), and also a Moran number because the ratio is a prime number: 11846656093 = 639719429022 / (6 + 3 + 9 + 7 + 1 + 9 + 4 + 2 + 9 + 0 + 2 + 2).

It is a self number, because there is not a number n which added to its sum of digits gives 639719429022.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (639719429021) 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, 5923327993 + ... + 5923328100.

It is an arithmetic number, because the mean of its divisors is an integer number (88849920705).

Almost surely, 2^639719429022 is an apocalyptic number.

639719429022 is an abundant number, since it is smaller than the sum of its proper divisors (781879302258).

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

639719429022 is a wasteful number, since it uses less digits than its factorization.

639719429022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11846656104 (or 11846656098 counting only the distinct ones).

The product of its (nonzero) digits is 2939328, while the sum is 54.

The spelling of 639719429022 in words is "six hundred thirty-nine billion, seven hundred nineteen million, four hundred twenty-nine thousand, twenty-two".