7881912425 has 12 divisors (see below), whose sum is σ = 9806937420. Its totient is φ = 6284003520.

The previous prime is 7881912403. The next prime is 7881912439. The reversal of 7881912425 is 5242191887.

It can be written as a sum of positive squares in 6 ways, for example, as 1238195344 + 6643717081 = 35188^2 + 81509^2 .

It is not a de Polignac number, because 7881912425 - 2²⁰ = 7880863849 is a prime.

It is a super-3 number, since 3×7881912425³ (a number of 31 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 7881912425.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 530690 + ... + 545339.

It is an arithmetic number, because the mean of its divisors is an integer number (817244785).

Almost surely, 2^7881912425 is an apocalyptic number.

It is an amenable number.

7881912425 is a deficient number, since it is larger than the sum of its proper divisors (1925024995).

7881912425 is a wasteful number, since it uses less digits than its factorization.

7881912425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1076332 (or 1076327 counting only the distinct ones).

The product of its digits is 322560, while the sum is 47.

The square root of 7881912425 is about 88780.1353062722. The cubic root of 7881912425 is about 1990.1105487268.

The spelling of 7881912425 in words is "seven billion, eight hundred eighty-one million, nine hundred twelve thousand, four hundred twenty-five".