26021205949 has 2 divisors, whose sum is σ = 26021205950. Its totient is φ = 26021205948.

The previous prime is 26021205943. The next prime is 26021205953. The reversal of 26021205949 is 94950212062.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 23117073849 + 2904132100 = 152043^2 + 53890^2 .

It is a cyclic number.

It is not a de Polignac number, because 26021205949 - 2¹³ = 26021197757 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26021205943) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13010602974 + 13010602975.

It is an arithmetic number, because the mean of its divisors is an integer number (13010602975).

Almost surely, 2^26021205949 is an apocalyptic number.

It is an amenable number.

26021205949 is a deficient number, since it is larger than the sum of its proper divisors (1).

26021205949 is an equidigital number, since it uses as much as digits as its factorization.

26021205949 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 77760, while the sum is 40.

The spelling of 26021205949 in words is "twenty-six billion, twenty-one million, two hundred five thousand, nine hundred forty-nine".