26564132497 has 24 divisors (see below), whose sum is σ = 31359120000. Its totient is φ = 22434039936.

The previous prime is 26564132473. The next prime is 26564132669. The reversal of 26564132497 is 79423146562.

It is not a de Polignac number, because 26564132497 - 2¹¹ = 26564130449 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 26564132497.

It is not an unprimeable number, because it can be changed into a prime (26564132297) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 991129 + ... + 1017577.

It is an arithmetic number, because the mean of its divisors is an integer number (1306630000).

Almost surely, 2^26564132497 is an apocalyptic number.

It is an amenable number.

26564132497 is a deficient number, since it is larger than the sum of its proper divisors (4794987503).

26564132497 is a wasteful number, since it uses less digits than its factorization.

26564132497 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26765 (or 26758 counting only the distinct ones).

The product of its digits is 2177280, while the sum is 49.

The spelling of 26564132497 in words is "twenty-six billion, five hundred sixty-four million, one hundred thirty-two thousand, four hundred ninety-seven".