26512556149 has 2 divisors, whose sum is σ = 26512556150. Its totient is φ = 26512556148.

The previous prime is 26512556111. The next prime is 26512556153. The reversal of 26512556149 is 94165521562.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20637333649 + 5875222500 = 143657^2 + 76650^2 .

It is a cyclic number.

It is not a de Polignac number, because 26512556149 - 2¹⁷ = 26512425077 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 26512556099 and 26512556108.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26512056149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13256278074 + 13256278075.

It is an arithmetic number, because the mean of its divisors is an integer number (13256278075).

Almost surely, 2^26512556149 is an apocalyptic number.

It is an amenable number.

26512556149 is a deficient number, since it is larger than the sum of its proper divisors (1).

26512556149 is an equidigital number, since it uses as much as digits as its factorization.

26512556149 is an evil number, because the sum of its binary digits is even.

The product of its digits is 648000, while the sum is 46.

The spelling of 26512556149 in words is "twenty-six billion, five hundred twelve million, five hundred fifty-six thousand, one hundred forty-nine".