639898711576 has 16 divisors (see below), whose sum is σ = 1251975740400. Its totient is φ = 306038514144.

The previous prime is 639898711561. The next prime is 639898711579. The reversal of 639898711576 is 675117898936.

It is a happy number.

It is a super-2 number, since 2×639898711576² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (639898711579) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1738855011 + ... + 1738855378.

It is an arithmetic number, because the mean of its divisors is an integer number (78248483775).

Almost surely, 2^639898711576 is an apocalyptic number.

It is an amenable number.

639898711576 is a deficient number, since it is larger than the sum of its proper divisors (612077028824).

639898711576 is a wasteful number, since it uses less digits than its factorization.

639898711576 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3477710418 (or 3477710414 counting only the distinct ones).

The product of its digits is 137168640, while the sum is 70.

The spelling of 639898711576 in words is "six hundred thirty-nine billion, eight hundred ninety-eight million, seven hundred eleven thousand, five hundred seventy-six".