639802733143 has 16 divisors (see below), whose sum is σ = 737287474176. Its totient is φ = 543851337600.

The previous prime is 639802733137. The next prime is 639802733189. The reversal of 639802733143 is 341337208936.

It is a cyclic number.

It is not a de Polignac number, because 639802733143 - 2⁵ = 639802733111 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (639802733743) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 116430 + ... + 1137172.

It is an arithmetic number, because the mean of its divisors is an integer number (46080467136).

Almost surely, 2^639802733143 is an apocalyptic number.

639802733143 is a deficient number, since it is larger than the sum of its proper divisors (97484741033).

639802733143 is a wasteful number, since it uses less digits than its factorization.

639802733143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1021494.

The product of its (nonzero) digits is 1959552, while the sum is 49.

The spelling of 639802733143 in words is "six hundred thirty-nine billion, eight hundred two million, seven hundred thirty-three thousand, one hundred forty-three".