2601643555 has 32 divisors (see below), whose sum is σ = 3606883200. Its totient is φ = 1764633600.

The previous prime is 2601643543. The next prime is 2601643559. The reversal of 2601643555 is 5553461062.

2601643555 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2601643555 - 2⁵ = 2601643523 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2601643559) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1443655 + ... + 1445455.

It is an arithmetic number, because the mean of its divisors is an integer number (112715100).

Almost surely, 2^2601643555 is an apocalyptic number.

2601643555 is a deficient number, since it is larger than the sum of its proper divisors (1005239645).

2601643555 is a wasteful number, since it uses less digits than its factorization.

2601643555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2239.

The product of its (nonzero) digits is 108000, while the sum is 37.

The square root of 2601643555 is about 51006.3089725183. The cubic root of 2601643555 is about 1375.3585498010.

The spelling of 2601643555 in words is "two billion, six hundred one million, six hundred forty-three thousand, five hundred fifty-five".