2685946978 has 16 divisors (see below), whose sum is σ = 4733277696. Its totient is φ = 1126970640.

The previous prime is 2685946961. The next prime is 2685946993. The reversal of 2685946978 is 8796495862.

It is a super-2 number, since 2×2685946978² = 14428622337254664968, which contains 22 as substring.

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, 4695426 + ... + 4695997.

It is an arithmetic number, because the mean of its divisors is an integer number (295829856).

Almost surely, 2^2685946978 is an apocalyptic number.

2685946978 is a deficient number, since it is larger than the sum of its proper divisors (2047330718).

2685946978 is a wasteful number, since it uses less digits than its factorization.

2685946978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9391449.

The product of its digits is 52254720, while the sum is 64.

The square root of 2685946978 is about 51826.1225445238. The cubic root of 2685946978 is about 1390.0565817245.

It can be divided in two parts, 268594 and 6978, that added together give a palindrome (275572).

The spelling of 2685946978 in words is "two billion, six hundred eighty-five million, nine hundred forty-six thousand, nine hundred seventy-eight".