7881126785 has 16 divisors (see below), whose sum is σ = 10810195200. Its totient is φ = 5403304896.

The previous prime is 7881126769. The next prime is 7881126823. The reversal of 7881126785 is 5876211887.

7881126785 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 7881126785 - 2⁴ = 7881126769 is a prime.

It is a super-2 number, since 2×7881126785² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 249671 + ... + 279459.

It is an arithmetic number, because the mean of its divisors is an integer number (675637200).

Almost surely, 2^7881126785 is an apocalyptic number.

It is an amenable number.

7881126785 is a deficient number, since it is larger than the sum of its proper divisors (2929068415).

7881126785 is a wasteful number, since it uses less digits than its factorization.

7881126785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37360.

The product of its digits is 1505280, while the sum is 53.

The square root of 7881126785 is about 88775.7105575619. The cubic root of 7881126785 is about 1990.0444242332.

The spelling of 7881126785 in words is "seven billion, eight hundred eighty-one million, one hundred twenty-six thousand, seven hundred eighty-five".