2655517778 has 16 divisors (see below), whose sum is σ = 4037679360. Its totient is φ = 1309725696.

The previous prime is 2655517769. The next prime is 2655517801. The reversal of 2655517778 is 8777155562.

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, 27863 + ... + 78021.

It is an arithmetic number, because the mean of its divisors is an integer number (252354960).

Almost surely, 2^2655517778 is an apocalyptic number.

2655517778 is a deficient number, since it is larger than the sum of its proper divisors (1382161582).

2655517778 is a wasteful number, since it uses less digits than its factorization.

2655517778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50521.

The product of its digits is 4116000, while the sum is 53.

The square root of 2655517778 is about 51531.7162337914. The cubic root of 2655517778 is about 1384.7872972891.

The spelling of 2655517778 in words is "two billion, six hundred fifty-five million, five hundred seventeen thousand, seven hundred seventy-eight".