7891679142 has 24 divisors (see below), whose sum is σ = 17170189920. Its totient is φ = 2619551760.

The previous prime is 7891679141. The next prime is 7891679209. The reversal of 7891679142 is 2419761987.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7891679141) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 912909 + ... + 921512.

It is an arithmetic number, because the mean of its divisors is an integer number (715424580).

Almost surely, 2^7891679142 is an apocalyptic number.

7891679142 is an abundant number, since it is smaller than the sum of its proper divisors (9278510778).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

7891679142 is a wasteful number, since it uses less digits than its factorization.

7891679142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1834668 (or 1834665 counting only the distinct ones).

The product of its digits is 1524096, while the sum is 54.

The square root of 7891679142 is about 88835.1233578251. The cubic root of 7891679142 is about 1990.9322115729.

The spelling of 7891679142 in words is "seven billion, eight hundred ninety-one million, six hundred seventy-nine thousand, one hundred forty-two".