26746563545 has 16 divisors (see below), whose sum is σ = 34570340112. Its totient is φ = 19748136960.

The previous prime is 26746563527. The next prime is 26746563551. The reversal of 26746563545 is 54536564762.

It can be written as a sum of positive squares in 8 ways, for example, as 1563095296 + 25183468249 = 39536^2 + 158693^2 .

It is a de Polignac number, because none of the positive numbers 2^k-26746563545 is a prime.

It is a super-2 number, since 2×26746563545² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 422909 + ... + 482021.

It is an arithmetic number, because the mean of its divisors is an integer number (2160646257).

Almost surely, 2^26746563545 is an apocalyptic number.

It is an amenable number.

26746563545 is a deficient number, since it is larger than the sum of its proper divisors (7823776567).

26746563545 is a wasteful number, since it uses less digits than its factorization.

26746563545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66092.

The product of its digits is 18144000, while the sum is 53.

The spelling of 26746563545 in words is "twenty-six billion, seven hundred forty-six million, five hundred sixty-three thousand, five hundred forty-five".