2555001778 has 32 divisors (see below), whose sum is σ = 4495075200. Its totient is φ = 1066383360.

The previous prime is 2555001749. The next prime is 2555001817. The reversal of 2555001778 is 8771005552.

It is a super-2 number, since 2×2555001778² = 13056068171166322568, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2555001778.

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, 204018 + ... + 216178.

It is an arithmetic number, because the mean of its divisors is an integer number (140471100).

Almost surely, 2^2555001778 is an apocalyptic number.

2555001778 is a deficient number, since it is larger than the sum of its proper divisors (1940073422).

2555001778 is a wasteful number, since it uses less digits than its factorization.

2555001778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12562.

The product of its (nonzero) digits is 98000, while the sum is 40.

The square root of 2555001778 is about 50547.0254119864. The cubic root of 2555001778 is about 1367.0898815281.

The spelling of 2555001778 in words is "two billion, five hundred fifty-five million, one thousand, seven hundred seventy-eight".