639181046 has 8 divisors (see below), whose sum is σ = 1095738960. Its totient is φ = 273934728.

The previous prime is 639181027. The next prime is 639181073. The reversal of 639181046 is 640181936.

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 pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22827881 + ... + 22827908.

It is an arithmetic number, because the mean of its divisors is an integer number (136967370).

Almost surely, 2^639181046 is an apocalyptic number.

639181046 is a deficient number, since it is larger than the sum of its proper divisors (456557914).

639181046 is a wasteful number, since it uses less digits than its factorization.

639181046 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45655798.

The product of its (nonzero) digits is 31104, while the sum is 38.

The square root of 639181046 is about 25282.0301004488. The cubic root of 639181046 is about 861.4061393419.

The spelling of 639181046 in words is "six hundred thirty-nine million, one hundred eighty-one thousand, forty-six".