2640139582 has 8 divisors (see below), whose sum is σ = 3960879696. Its totient is φ = 1319846352.

The previous prime is 2640139561. The next prime is 2640139637. The reversal of 2640139582 is 2859310462.

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 (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 96538 + ... + 120829.

It is an arithmetic number, because the mean of its divisors is an integer number (495109962).

Almost surely, 2^2640139582 is an apocalyptic number.

2640139582 is a deficient number, since it is larger than the sum of its proper divisors (1320740114).

2640139582 is a wasteful number, since it uses less digits than its factorization.

2640139582 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 223442.

The product of its (nonzero) digits is 103680, while the sum is 40.

The square root of 2640139582 is about 51382.2886022022. The cubic root of 2640139582 is about 1382.1090034188.

The spelling of 2640139582 in words is "two billion, six hundred forty million, one hundred thirty-nine thousand, five hundred eighty-two".