2125405647 has 12 divisors (see below), whose sum is σ = 3073305144. Its totient is φ = 1415425680.

The previous prime is 2125405627. The next prime is 2125405657. The reversal of 2125405647 is 7465045212.

It is a happy number.

2125405647 is a `hidden beast` number, since 2 + 1 + 2 + 5 + 4 + 0 + 5 + 647 = 666.

It is not a de Polignac number, because 2125405647 - 2¹⁶ = 2125340111 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2125405627) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 117013 + ... + 133950.

It is an arithmetic number, because the mean of its divisors is an integer number (256108762).

Almost surely, 2^2125405647 is an apocalyptic number.

2125405647 is a deficient number, since it is larger than the sum of its proper divisors (947899497).

2125405647 is a wasteful number, since it uses less digits than its factorization.

2125405647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 251910 (or 251907 counting only the distinct ones).

The product of its (nonzero) digits is 67200, while the sum is 36.

The square root of 2125405647 is about 46102.1219359803. The cubic root of 2125405647 is about 1285.7225966077.

The spelling of 2125405647 in words is "two billion, one hundred twenty-five million, four hundred five thousand, six hundred forty-seven".