26727732491 has 2 divisors, whose sum is σ = 26727732492. Its totient is φ = 26727732490.

The previous prime is 26727732461. The next prime is 26727732541. The reversal of 26727732491 is 19423772762.

It is a happy number.

It is an a-pointer prime, because the next prime (26727732541) can be obtained adding 26727732491 to its sum of digits (50).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 26727732491 - 2¹⁰ = 26727731467 is a prime.

It is a super-2 number, since 2×26727732491² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (26727732461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13363866245 + 13363866246.

It is an arithmetic number, because the mean of its divisors is an integer number (13363866246).

Almost surely, 2^26727732491 is an apocalyptic number.

26727732491 is a deficient number, since it is larger than the sum of its proper divisors (1).

26727732491 is an equidigital number, since it uses as much as digits as its factorization.

26727732491 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1778112, while the sum is 50.

The spelling of 26727732491 in words is "twenty-six billion, seven hundred twenty-seven million, seven hundred thirty-two thousand, four hundred ninety-one".