26264023561 has 2 divisors, whose sum is σ = 26264023562. Its totient is φ = 26264023560.

The previous prime is 26264023481. The next prime is 26264023567. The reversal of 26264023561 is 16532046262.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25722065161 + 541958400 = 160381^2 + 23280^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-26264023561 is a prime.

It is a super-2 number, since 2×26264023561² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 26264023561.

It is not a weakly prime, because it can be changed into another prime (26264023567) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13132011780 + 13132011781.

It is an arithmetic number, because the mean of its divisors is an integer number (13132011781).

Almost surely, 2^26264023561 is an apocalyptic number.

It is an amenable number.

26264023561 is a deficient number, since it is larger than the sum of its proper divisors (1).

26264023561 is an equidigital number, since it uses as much as digits as its factorization.

26264023561 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 103680, while the sum is 37.

The spelling of 26264023561 in words is "twenty-six billion, two hundred sixty-four million, twenty-three thousand, five hundred sixty-one".