7881771125 has 32 divisors (see below), whose sum is σ = 10003938048. Its totient is φ = 6198456000.

The previous prime is 7881771109. The next prime is 7881771127. The reversal of 7881771125 is 5211771887.

It is not a de Polignac number, because 7881771125 - 2⁴ = 7881771109 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 7881771125.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7881771127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7428095 + ... + 7429155.

It is an arithmetic number, because the mean of its divisors is an integer number (312623064).

Almost surely, 2^7881771125 is an apocalyptic number.

It is an amenable number.

7881771125 is a deficient number, since it is larger than the sum of its proper divisors (2122166923).

7881771125 is a wasteful number, since it uses less digits than its factorization.

7881771125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2030 (or 2020 counting only the distinct ones).

The product of its digits is 219520, while the sum is 47.

The square root of 7881771125 is about 88779.3395165790. The cubic root of 7881771125 is about 1990.0986563380.

The spelling of 7881771125 in words is "seven billion, eight hundred eighty-one million, seven hundred seventy-one thousand, one hundred twenty-five".