2655490981 has 16 divisors (see below), whose sum is σ = 3133166400. Its totient is φ = 2218792320.

The previous prime is 2655490973. The next prime is 2655491009. The reversal of 2655490981 is 1890945562.

It is a cyclic number.

It is not a de Polignac number, because 2655490981 - 2³ = 2655490973 is a prime.

It is a super-2 number, since 2×2655490981² = 14103264700344684722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2655490781) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6531 + ... + 73168.

It is an arithmetic number, because the mean of its divisors is an integer number (195822900).

Almost surely, 2^2655490981 is an apocalyptic number.

It is an amenable number.

2655490981 is a deficient number, since it is larger than the sum of its proper divisors (477675419).

2655490981 is a wasteful number, since it uses less digits than its factorization.

2655490981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79956.

The product of its (nonzero) digits is 777600, while the sum is 49.

The square root of 2655490981 is about 51531.4562282107. The cubic root of 2655490981 is about 1384.7826392810.

The spelling of 2655490981 in words is "two billion, six hundred fifty-five million, four hundred ninety thousand, nine hundred eighty-one".