26450720731 has 2 divisors, whose sum is σ = 26450720732. Its totient is φ = 26450720730.

The previous prime is 26450720651. The next prime is 26450720741. The reversal of 26450720731 is 13702705462.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-26450720731 is a prime.

It is a super-2 number, since 2×26450720731² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (26450720741) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13225360365 + 13225360366.

It is an arithmetic number, because the mean of its divisors is an integer number (13225360366).

Almost surely, 2^26450720731 is an apocalyptic number.

26450720731 is a deficient number, since it is larger than the sum of its proper divisors (1).

26450720731 is an equidigital number, since it uses as much as digits as its factorization.

26450720731 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 70560, while the sum is 37.

The spelling of 26450720731 in words is "twenty-six billion, four hundred fifty million, seven hundred twenty thousand, seven hundred thirty-one".