25601653287 has 16 divisors (see below), whose sum is σ = 43346714880. Its totient is φ = 14629516056.

The previous prime is 25601653261. The next prime is 25601653289. The reversal of 25601653287 is 78235610652.

25601653287 is a `hidden beast` number, since 2 + 5 + 601 + 6 + 5 + 32 + 8 + 7 = 666.

It is not a de Polignac number, because 25601653287 - 2⁷ = 25601653159 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25601653289) 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, 67729053 + ... + 67729430.

It is an arithmetic number, because the mean of its divisors is an integer number (2709169680).

Almost surely, 2^25601653287 is an apocalyptic number.

25601653287 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

25601653287 is a deficient number, since it is larger than the sum of its proper divisors (17745061593).

25601653287 is a wasteful number, since it uses less digits than its factorization.

25601653287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135458499 (or 135458493 counting only the distinct ones).

The product of its (nonzero) digits is 604800, while the sum is 45.

The spelling of 25601653287 in words is "twenty-five billion, six hundred one million, six hundred fifty-three thousand, two hundred eighty-seven".