7951992155 has 4 divisors (see below), whose sum is σ = 9542390592. Its totient is φ = 6361593720.

The previous prime is 7951992151. The next prime is 7951992161. The reversal of 7951992155 is 5512991597.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 7951992155 - 2² = 7951992151 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 7951992097 and 7951992106.

It is not an unprimeable number, because it can be changed into a prime (7951992151) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 795199211 + ... + 795199220.

It is an arithmetic number, because the mean of its divisors is an integer number (2385597648).

Almost surely, 2^7951992155 is an apocalyptic number.

7951992155 is a deficient number, since it is larger than the sum of its proper divisors (1590398437).

7951992155 is a wasteful number, since it uses less digits than its factorization.

7951992155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1590398436.

The product of its digits is 1275750, while the sum is 53.

The square root of 7951992155 is about 89173.9432513781. The cubic root of 7951992155 is about 1995.9913168478.

The spelling of 7951992155 in words is "seven billion, nine hundred fifty-one million, nine hundred ninety-two thousand, one hundred fifty-five".