25647218890 has 16 divisors (see below), whose sum is σ = 46239585120. Its totient is φ = 10242311760.

The previous prime is 25647218869. The next prime is 25647218897. The reversal of 25647218890 is 9881274652.

It is not an unprimeable number, because it can be changed into a prime (25647218897) 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, 2065476 + ... + 2077855.

It is an arithmetic number, because the mean of its divisors is an integer number (2889974070).

Almost surely, 2^25647218890 is an apocalyptic number.

25647218890 is a deficient number, since it is larger than the sum of its proper divisors (20592366230).

25647218890 is a wasteful number, since it uses less digits than its factorization.

25647218890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4143957.

The product of its (nonzero) digits is 1935360, while the sum is 52.

The spelling of 25647218890 in words is "twenty-five billion, six hundred forty-seven million, two hundred eighteen thousand, eight hundred ninety".