26444640040157 has 2 divisors, whose sum is σ = 26444640040158. Its totient is φ = 26444640040156.

The previous prime is 26444640040097. The next prime is 26444640040277. The reversal of 26444640040157 is 75104004644462.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 23516961626041 + 2927678414116 = 4849429^2 + 1711046^2 .

It is a cyclic number.

It is not a de Polignac number, because 26444640040157 - 2³⁸ = 26169762133213 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26444640045157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13222320020078 + 13222320020079.

It is an arithmetic number, because the mean of its divisors is an integer number (13222320020079).

Almost surely, 2^{26444640040157} is an apocalyptic number.

It is an amenable number.

26444640040157 is a deficient number, since it is larger than the sum of its proper divisors (1).

26444640040157 is an equidigital number, since it uses as much as digits as its factorization.

26444640040157 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2580480, while the sum is 47.

The spelling of 26444640040157 in words is "twenty-six trillion, four hundred forty-four billion, six hundred forty million, forty thousand, one hundred fifty-seven".