7921158827 has 8 divisors (see below), whose sum is σ = 7939782000. Its totient is φ = 7902552544.

The previous prime is 7921158799. The next prime is 7921158841. The reversal of 7921158827 is 7288511297.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7921158827 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7921158887) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1550924 + ... + 1556022.

It is an arithmetic number, because the mean of its divisors is an integer number (992472750).

Almost surely, 2^7921158827 is an apocalyptic number.

7921158827 is a deficient number, since it is larger than the sum of its proper divisors (18623173).

7921158827 is a wasteful number, since it uses less digits than its factorization.

7921158827 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8445.

The product of its digits is 564480, while the sum is 50.

The square root of 7921158827 is about 89000.8922820440. The cubic root of 7921158827 is about 1993.4082002066.

The spelling of 7921158827 in words is "seven billion, nine hundred twenty-one million, one hundred fifty-eight thousand, eight hundred twenty-seven".