639469746283 has 16 divisors (see below), whose sum is σ = 658690341120. Its totient is φ = 620533177056.

The previous prime is 639469746277. The next prime is 639469746427. The reversal of 639469746283 is 382647964936.

It is not a de Polignac number, because 639469746283 - 2²¹ = 639467649131 is a prime.

It is a super-2 number, since 2×639469746283² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (639469746203) 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 15 ways as a sum of consecutive naturals, for example, 3419266 + ... + 3601432.

It is an arithmetic number, because the mean of its divisors is an integer number (41168146320).

Almost surely, 2^639469746283 is an apocalyptic number.

639469746283 is a deficient number, since it is larger than the sum of its proper divisors (19220594837).

639469746283 is a wasteful number, since it uses less digits than its factorization.

639469746283 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 182946.

The product of its digits is 282175488, while the sum is 67.

The spelling of 639469746283 in words is "six hundred thirty-nine billion, four hundred sixty-nine million, seven hundred forty-six thousand, two hundred eighty-three".