26490440939 has 2 divisors, whose sum is σ = 26490440940. Its totient is φ = 26490440938.

The previous prime is 26490440929. The next prime is 26490440987. The reversal of 26490440939 is 93904409462.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-26490440939 is a prime.

It is a super-2 number, since 2×26490440939² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (26490440929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13245220469 + 13245220470.

It is an arithmetic number, because the mean of its divisors is an integer number (13245220470).

Almost surely, 2^26490440939 is an apocalyptic number.

26490440939 is a deficient number, since it is larger than the sum of its proper divisors (1).

26490440939 is an equidigital number, since it uses as much as digits as its factorization.

26490440939 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1679616, while the sum is 50.

The spelling of 26490440939 in words is "twenty-six billion, four hundred ninety million, four hundred forty thousand, nine hundred thirty-nine".