2790981655 has 64 divisors (see below), whose sum is σ = 4259340288. Its totient is φ = 1705311360.

The previous prime is 2790981653. The next prime is 2790981659. The reversal of 2790981655 is 5561890972.

It is not a de Polignac number, because 2790981655 - 2¹ = 2790981653 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2790981653) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 5336224 + ... + 5336746.

It is an arithmetic number, because the mean of its divisors is an integer number (66552192).

Almost surely, 2^2790981655 is an apocalyptic number.

2790981655 is a deficient number, since it is larger than the sum of its proper divisors (1468358633).

2790981655 is a wasteful number, since it uses less digits than its factorization.

2790981655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 796.

The product of its (nonzero) digits is 1360800, while the sum is 52.

The square root of 2790981655 is about 52829.7421439855. The cubic root of 2790981655 is about 1407.9449052927.

The spelling of 2790981655 in words is "two billion, seven hundred ninety million, nine hundred eighty-one thousand, six hundred fifty-five".