68561525 has 6 divisors (see below), whose sum is σ = 85016322. Its totient is φ = 54849200.

The previous prime is 68561509. The next prime is 68561531. The reversal of 68561525 is 52516586.

It can be written as a sum of positive squares in 3 ways, for example, as 515524 + 68046001 = 718^2 + 8249^2 .

It is not a de Polignac number, because 68561525 - 2⁴ = 68561509 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 5 ways as a sum of consecutive naturals, for example, 1371206 + ... + 1371255.

It is an arithmetic number, because the mean of its divisors is an integer number (14169387).

Almost surely, 2^68561525 is an apocalyptic number.

It is an amenable number.

68561525 is a deficient number, since it is larger than the sum of its proper divisors (16454797).

68561525 is a wasteful number, since it uses less digits than its factorization.

68561525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2742471 (or 2742466 counting only the distinct ones).

The product of its digits is 72000, while the sum is 38.

The square root of 68561525 is about 8280.1887055791. The cubic root of 68561525 is about 409.2859373487.

The spelling of 68561525 in words is "sixty-eight million, five hundred sixty-one thousand, five hundred twenty-five".