2172628605 has 16 divisors (see below), whose sum is σ = 3972806784. Its totient is φ = 993201600.

The previous prime is 2172628603. The next prime is 2172628637. The reversal of 2172628605 is 5068262712.

It is not a de Polignac number, because 2172628605 - 2¹ = 2172628603 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2172628603) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10345746 + ... + 10345955.

It is an arithmetic number, because the mean of its divisors is an integer number (248300424).

Almost surely, 2^2172628605 is an apocalyptic number.

It is an amenable number.

2172628605 is a deficient number, since it is larger than the sum of its proper divisors (1800178179).

2172628605 is a wasteful number, since it uses less digits than its factorization.

2172628605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20691716.

The product of its (nonzero) digits is 80640, while the sum is 39.

The square root of 2172628605 is about 46611.4643086870. The cubic root of 2172628605 is about 1295.1751337109.

The spelling of 2172628605 in words is "two billion, one hundred seventy-two million, six hundred twenty-eight thousand, six hundred five".