639097154142 has 16 divisors (see below), whose sum is σ = 1278208041600. Its totient is φ = 213030095832.

The previous prime is 639097154039. The next prime is 639097154207. The reversal of 639097154142 is 241451790936.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 92073 + ... + 1134315.

It is an arithmetic number, because the mean of its divisors is an integer number (79888002600).

Almost surely, 2^639097154142 is an apocalyptic number.

639097154142 is an abundant number, since it is smaller than the sum of its proper divisors (639110887458).

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

639097154142 is a wasteful number, since it uses less digits than its factorization.

639097154142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1144447.

The product of its (nonzero) digits is 1632960, while the sum is 51.

The spelling of 639097154142 in words is "six hundred thirty-nine billion, ninety-seven million, one hundred fifty-four thousand, one hundred forty-two".