7878072785 has 16 divisors (see below), whose sum is σ = 10552956480. Its totient is φ = 5596261440.

The previous prime is 7878072767. The next prime is 7878072791. The reversal of 7878072785 is 5872708787.

It is not a de Polignac number, because 7878072785 - 2¹⁴ = 7878056401 is a prime.

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, 1663190 + ... + 1667919.

It is an arithmetic number, because the mean of its divisors is an integer number (659559780).

Almost surely, 2^7878072785 is an apocalyptic number.

It is an amenable number.

7878072785 is a deficient number, since it is larger than the sum of its proper divisors (2674883695).

7878072785 is a wasteful number, since it uses less digits than its factorization.

7878072785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3331168.

The product of its (nonzero) digits is 12293120, while the sum is 59.

The square root of 7878072785 is about 88758.5082400555. The cubic root of 7878072785 is about 1989.7873382841.

The spelling of 7878072785 in words is "seven billion, eight hundred seventy-eight million, seventy-two thousand, seven hundred eighty-five".