7891054158 has 32 divisors (see below), whose sum is σ = 17455477536. Its totient is φ = 2362393728.

The previous prime is 7891054007. The next prime is 7891054159. The reversal of 7891054158 is 8514501987.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7891054159) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1364241 + ... + 1370012.

It is an arithmetic number, because the mean of its divisors is an integer number (545483673).

Almost surely, 2^7891054158 is an apocalyptic number.

7891054158 is a gapful number since it is divisible by the number (78) formed by its first and last digit.

7891054158 is an abundant number, since it is smaller than the sum of its proper divisors (9564423378).

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

7891054158 is a wasteful number, since it uses less digits than its factorization.

7891054158 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2734308.

The product of its (nonzero) digits is 403200, while the sum is 48.

The square root of 7891054158 is about 88831.6056254754. The cubic root of 7891054158 is about 1990.8796526855.

The spelling of 7891054158 in words is "seven billion, eight hundred ninety-one million, fifty-four thousand, one hundred fifty-eight".