2643974655 has 32 divisors (see below), whose sum is σ = 4990660608. Its totient is φ = 1169683200.

The previous prime is 2643974639. The next prime is 2643974681. The reversal of 2643974655 is 5564793462.

It is not a de Polignac number, because 2643974655 - 2⁴ = 2643974639 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2643974598 and 2643974607.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 402886 + ... + 409395.

It is an arithmetic number, because the mean of its divisors is an integer number (155958144).

Almost surely, 2^2643974655 is an apocalyptic number.

2643974655 is a deficient number, since it is larger than the sum of its proper divisors (2346685953).

2643974655 is a wasteful number, since it uses less digits than its factorization.

2643974655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 812327.

The product of its digits is 5443200, while the sum is 51.

The square root of 2643974655 is about 51419.5940765775. The cubic root of 2643974655 is about 1382.7778979129. Note that the first 3 decimals are identical.

The spelling of 2643974655 in words is "two billion, six hundred forty-three million, nine hundred seventy-four thousand, six hundred fifty-five".