26540636025 has 48 divisors (see below), whose sum is σ = 44839415808. Its totient is φ = 13848744000.

The previous prime is 26540636021. The next prime is 26540636027. The reversal of 26540636025 is 52063604562.

It is not a de Polignac number, because 26540636025 - 2² = 26540636021 is a prime.

It is a super-2 number, since 2×26540636025² (a number of 22 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (26540636021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 678552 + ... + 716598.

It is an arithmetic number, because the mean of its divisors is an integer number (934154496).

Almost surely, 2^26540636025 is an apocalyptic number.

26540636025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

26540636025 is a deficient number, since it is larger than the sum of its proper divisors (18298779783).

26540636025 is a wasteful number, since it uses less digits than its factorization.

26540636025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38262 (or 38257 counting only the distinct ones).

The product of its (nonzero) digits is 259200, while the sum is 39.

The spelling of 26540636025 in words is "twenty-six billion, five hundred forty million, six hundred thirty-six thousand, twenty-five".