25648838985 has 64 divisors (see below), whose sum is σ = 51196022784. Its totient is φ = 10652678400.

The previous prime is 25648838983. The next prime is 25648838989. The reversal of 25648838985 is 58983884652.

It is not a de Polignac number, because 25648838985 - 2¹ = 25648838983 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25648838983) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2162020 + ... + 2173850.

It is an arithmetic number, because the mean of its divisors is an integer number (799937856).

Almost surely, 2^25648838985 is an apocalyptic number.

It is an amenable number.

25648838985 is a deficient number, since it is larger than the sum of its proper divisors (25547183799).

25648838985 is a wasteful number, since it uses less digits than its factorization.

25648838985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13734.

The product of its digits is 132710400, while the sum is 66.

The spelling of 25648838985 in words is "twenty-five billion, six hundred forty-eight million, eight hundred thirty-eight thousand, nine hundred eighty-five".