2605609551 has 8 divisors (see below), whose sum is σ = 3586215424. Its totient is φ = 1681038360.

The previous prime is 2605609529. The next prime is 2605609577. The reversal of 2605609551 is 1559065062.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2605609551 - 2¹⁵ = 2605576783 is a prime.

It is a super-2 number, since 2×2605609551² = 13578402264524843202, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2605609451) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14008561 + ... + 14008746.

It is an arithmetic number, because the mean of its divisors is an integer number (448276928).

Almost surely, 2^2605609551 is an apocalyptic number.

2605609551 is a deficient number, since it is larger than the sum of its proper divisors (980605873).

2605609551 is a wasteful number, since it uses less digits than its factorization.

2605609551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28017341.

The product of its (nonzero) digits is 81000, while the sum is 39.

The square root of 2605609551 is about 51045.1716717654. The cubic root of 2605609551 is about 1376.0570694103.

The spelling of 2605609551 in words is "two billion, six hundred five million, six hundred nine thousand, five hundred fifty-one".