7855952771 has 4 divisors (see below), whose sum is σ = 7984738944. Its totient is φ = 7727166600.

The previous prime is 7855952747. The next prime is 7855952779. The reversal of 7855952771 is 1772595587.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7855952771 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7855952779) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 64392995 + ... + 64393116.

It is an arithmetic number, because the mean of its divisors is an integer number (1996184736).

Almost surely, 2^7855952771 is an apocalyptic number.

7855952771 is a deficient number, since it is larger than the sum of its proper divisors (128786173).

7855952771 is a wasteful number, since it uses less digits than its factorization.

7855952771 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128786172.

The product of its digits is 6174000, while the sum is 56.

The square root of 7855952771 is about 88633.8127973743. The cubic root of 7855952771 is about 1987.9232875374.

The spelling of 7855952771 in words is "seven billion, eight hundred fifty-five million, nine hundred fifty-two thousand, seven hundred seventy-one".