7782978265 has 16 divisors (see below), whose sum is σ = 10148267520. Its totient is φ = 5708396160.

The previous prime is 7782978253. The next prime is 7782978277. The reversal of 7782978265 is 5628792877.

It is an interprime number because it is at equal distance from previous prime (7782978253) and next prime (7782978277).

It is not a de Polignac number, because 7782978265 - 2¹⁵ = 7782945497 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, 1318444 + ... + 1324333.

It is an arithmetic number, because the mean of its divisors is an integer number (634266720).

Almost surely, 2^7782978265 is an apocalyptic number.

It is an amenable number.

7782978265 is a deficient number, since it is larger than the sum of its proper divisors (2365289255).

7782978265 is a wasteful number, since it uses less digits than its factorization.

7782978265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2642832.

The product of its digits is 23708160, while the sum is 61.

The square root of 7782978265 is about 88221.1894331515. The cubic root of 7782978265 is about 1981.7488090631.

The spelling of 7782978265 in words is "seven billion, seven hundred eighty-two million, nine hundred seventy-eight thousand, two hundred sixty-five".