26090579861 has 2 divisors, whose sum is σ = 26090579862. Its totient is φ = 26090579860.

The previous prime is 26090579849. The next prime is 26090579891. The reversal of 26090579861 is 16897509062.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21735899761 + 4354680100 = 147431^2 + 65990^2 .

It is a cyclic number.

It is not a de Polignac number, because 26090579861 - 2²² = 26086385557 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26090579891) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13045289930 + 13045289931.

It is an arithmetic number, because the mean of its divisors is an integer number (13045289931).

Almost surely, 2^26090579861 is an apocalyptic number.

It is an amenable number.

26090579861 is a deficient number, since it is larger than the sum of its proper divisors (1).

26090579861 is an equidigital number, since it uses as much as digits as its factorization.

26090579861 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1632960, while the sum is 53.

The spelling of 26090579861 in words is "twenty-six billion, ninety million, five hundred seventy-nine thousand, eight hundred sixty-one".