25636040560 has 80 divisors (see below), whose sum is σ = 65241136800. Its totient is φ = 9310417920.

The previous prime is 25636040531. The next prime is 25636040611. The reversal of 25636040560 is 6504063652.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×25636040560² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 138610 + ... + 265489.

It is an arithmetic number, because the mean of its divisors is an integer number (815514210).

Almost surely, 2^25636040560 is an apocalyptic number.

25636040560 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25636040560 is an abundant number, since it is smaller than the sum of its proper divisors (39605096240).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25636040560 is a wasteful number, since it uses less digits than its factorization.

25636040560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 404186 (or 404180 counting only the distinct ones).

The product of its (nonzero) digits is 129600, while the sum is 37.

The spelling of 25636040560 in words is "twenty-five billion, six hundred thirty-six million, forty thousand, five hundred sixty".