2604001655 has 4 divisors (see below), whose sum is σ = 3124801992. Its totient is φ = 2083201320.

The previous prime is 2604001613. The next prime is 2604001663. The reversal of 2604001655 is 5561004062.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 2604001655 - 2¹⁰ = 2604000631 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 260400161 + ... + 260400170.

It is an arithmetic number, because the mean of its divisors is an integer number (781200498).

Almost surely, 2^2604001655 is an apocalyptic number.

2604001655 is a deficient number, since it is larger than the sum of its proper divisors (520800337).

2604001655 is an equidigital number, since it uses as much as digits as its factorization.

2604001655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 520800336.

The product of its (nonzero) digits is 7200, while the sum is 29.

The square root of 2604001655 is about 51029.4195048307. The cubic root of 2604001655 is about 1375.7739607446.

The spelling of 2604001655 in words is "two billion, six hundred four million, one thousand, six hundred fifty-five".