25564136026 has 32 divisors (see below), whose sum is σ = 45243551808. Its totient is φ = 10680147840.

The previous prime is 25564136011. The next prime is 25564136027. The reversal of 25564136026 is 62063146552.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 25564136026.

It is not an unprimeable number, because it can be changed into a prime (25564136027) 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, 125176 + ... + 258451.

It is an arithmetic number, because the mean of its divisors is an integer number (1413860994).

Almost surely, 2^25564136026 is an apocalyptic number.

25564136026 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

25564136026 is a deficient number, since it is larger than the sum of its proper divisors (19679415782).

25564136026 is a wasteful number, since it uses less digits than its factorization.

25564136026 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 383886.

The product of its (nonzero) digits is 259200, while the sum is 40.

The spelling of 25564136026 in words is "twenty-five billion, five hundred sixty-four million, one hundred thirty-six thousand, twenty-six".