25385528647 has 16 divisors (see below), whose sum is σ = 27275616000. Its totient is φ = 23539985280.

The previous prime is 25385528611. The next prime is 25385528699. The reversal of 25385528647 is 74682558352.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25385528647 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25385522647) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2044504 + ... + 2056882.

It is an arithmetic number, because the mean of its divisors is an integer number (1704726000).

Almost surely, 2^25385528647 is an apocalyptic number.

25385528647 is a deficient number, since it is larger than the sum of its proper divisors (1890087353).

25385528647 is a wasteful number, since it uses less digits than its factorization.

25385528647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14166.

The product of its digits is 16128000, while the sum is 55.

The spelling of 25385528647 in words is "twenty-five billion, three hundred eighty-five million, five hundred twenty-eight thousand, six hundred forty-seven".