639867297094 has 8 divisors (see below), whose sum is σ = 959805418968. Its totient is φ = 319932157440.

The previous prime is 639867297089. The next prime is 639867297133. The reversal of 639867297094 is 490792768936.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 95952 + ... + 1135315.

It is an arithmetic number, because the mean of its divisors is an integer number (119975677371).

Almost surely, 2^639867297094 is an apocalyptic number.

639867297094 is a deficient number, since it is larger than the sum of its proper divisors (319938121874).

639867297094 is a wasteful number, since it uses less digits than its factorization.

639867297094 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1491110.

The product of its (nonzero) digits is 246903552, while the sum is 70.

The spelling of 639867297094 in words is "six hundred thirty-nine billion, eight hundred sixty-seven million, two hundred ninety-seven thousand, ninety-four".