7611778361856 has 80 divisors (see below), whose sum is σ = 20305548736704. Its totient is φ = 2533844189184.

The previous prime is 7611778361827. The next prime is 7611778361977. The reversal of 7611778361856 is 6581638771167.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2193601 + ... + 4476096.

Almost surely, 2^{7611778361856} is an apocalyptic number.

It is an amenable number.

7611778361856 is an abundant number, since it is smaller than the sum of its proper divisors (12693770374848).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

7611778361856 is an equidigital number, since it uses as much as digits as its factorization.

7611778361856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6670461 (or 6670445 counting only the distinct ones).

The product of its digits is 71124480, while the sum is 66.

The spelling of 7611778361856 in words is "seven trillion, six hundred eleven billion, seven hundred seventy-eight million, three hundred sixty-one thousand, eight hundred fifty-six".