7901142639 has 32 divisors (see below), whose sum is σ = 11932268544. Its totient is φ = 4616576640.

The previous prime is 7901142637. The next prime is 7901142653. The reversal of 7901142639 is 9362411097.

It is not a de Polignac number, because 7901142639 - 2¹ = 7901142637 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 7901142639.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7901142637) 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 31 ways as a sum of consecutive naturals, for example, 2424 + ... + 125730.

It is an arithmetic number, because the mean of its divisors is an integer number (372883392).

Almost surely, 2^7901142639 is an apocalyptic number.

7901142639 is a deficient number, since it is larger than the sum of its proper divisors (4031125905).

7901142639 is a wasteful number, since it uses less digits than its factorization.

7901142639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123407.

The product of its (nonzero) digits is 81648, while the sum is 42.

The square root of 7901142639 is about 88888.3717873154. The cubic root of 7901142639 is about 1991.7277184353.

The spelling of 7901142639 in words is "seven billion, nine hundred one million, one hundred forty-two thousand, six hundred thirty-nine".