2639539942 has 32 divisors (see below), whose sum is σ = 4329561600. Its totient is φ = 1199566368.

The previous prime is 2639539897. The next prime is 2639539999. The reversal of 2639539942 is 2499359362.

It is a super-2 number, since 2×2639539942² = 13934342210826726728, which contains 22 as substring.

It is a Smith number, since the sum of its digits (52) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 2639539942.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 859093 + ... + 862159.

It is an arithmetic number, because the mean of its divisors is an integer number (135298800).

Almost surely, 2^2639539942 is an apocalyptic number.

2639539942 is a deficient number, since it is larger than the sum of its proper divisors (1690021658).

2639539942 is a wasteful number, since it uses less digits than its factorization.

2639539942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3580.

The product of its digits is 3149280, while the sum is 52.

The square root of 2639539942 is about 51376.4531862603. The cubic root of 2639539942 is about 1382.0043586239.

The spelling of 2639539942 in words is "two billion, six hundred thirty-nine million, five hundred thirty-nine thousand, nine hundred forty-two".