26631728597 has 4 divisors (see below), whose sum is σ = 26632973856. Its totient is φ = 26630483340.

The previous prime is 26631728587. The next prime is 26631728609. The reversal of 26631728597 is 79582713662.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 79582713662 = 2 ⋅39791356831.

It is a cyclic number.

It is not a de Polignac number, because 26631728597 - 2²⁶ = 26564619733 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26631728507) 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 3 ways as a sum of consecutive naturals, for example, 589979 + ... + 633512.

It is an arithmetic number, because the mean of its divisors is an integer number (6658243464).

Almost surely, 2^26631728597 is an apocalyptic number.

It is an amenable number.

26631728597 is a deficient number, since it is larger than the sum of its proper divisors (1245259).

26631728597 is a wasteful number, since it uses less digits than its factorization.

26631728597 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1245258.

The product of its digits is 7620480, while the sum is 56.

The spelling of 26631728597 in words is "twenty-six billion, six hundred thirty-one million, seven hundred twenty-eight thousand, five hundred ninety-seven".