2654678778 has 16 divisors (see below), whose sum is σ = 5310350976. Its totient is φ = 884727360.

The previous prime is 2654678717. The next prime is 2654678813. The reversal of 2654678778 is 8778764562.

It is a happy number.

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, 4063 + ... + 72978.

It is an arithmetic number, because the mean of its divisors is an integer number (331896936).

Almost surely, 2^2654678778 is an apocalyptic number.

2654678778 is an abundant number, since it is smaller than the sum of its proper divisors (2655672198).

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

2654678778 is a wasteful number, since it uses less digits than its factorization.

2654678778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82789.

The product of its digits is 31610880, while the sum is 60.

The square root of 2654678778 is about 51523.5749730160. The cubic root of 2654678778 is about 1384.6414426297.

The spelling of 2654678778 in words is "two billion, six hundred fifty-four million, six hundred seventy-eight thousand, seven hundred seventy-eight".