25648537 has 8 divisors (see below), whose sum is σ = 27380160. Its totient is φ = 23955120.

The previous prime is 25648531. The next prime is 25648543. The reversal of 25648537 is 73584652.

It is an interprime number because it is at equal distance from previous prime (25648531) and next prime (25648543).

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

It is a cyclic number.

It is not a de Polignac number, because 25648537 - 2⁷ = 25648409 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 25648537.

It is not an unprimeable number, because it can be changed into a prime (25648531) 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, 8158 + ... + 10855.

It is an arithmetic number, because the mean of its divisors is an integer number (3422520).

Almost surely, 2^25648537 is an apocalyptic number.

It is an amenable number.

25648537 is a deficient number, since it is larger than the sum of its proper divisors (1731623).

25648537 is a wasteful number, since it uses less digits than its factorization.

25648537 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19103.

The product of its digits is 201600, while the sum is 40.

The square root of 25648537 is about 5064.4384683793. The cubic root of 25648537 is about 294.9086646288.

The spelling of 25648537 in words is "twenty-five million, six hundred forty-eight thousand, five hundred thirty-seven".