26537890193 has 2 divisors, whose sum is σ = 26537890194. Its totient is φ = 26537890192.

The previous prime is 26537890189. The next prime is 26537890201. The reversal of 26537890193 is 39109873562.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25235546449 + 1302343744 = 158857^2 + 36088^2 .

It is a cyclic number.

It is not a de Polignac number, because 26537890193 - 2² = 26537890189 is a prime.

It is not a weakly prime, because it can be changed into another prime (26537890993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13268945096 + 13268945097.

It is an arithmetic number, because the mean of its divisors is an integer number (13268945097).

Almost surely, 2^26537890193 is an apocalyptic number.

It is an amenable number.

26537890193 is a deficient number, since it is larger than the sum of its proper divisors (1).

26537890193 is an equidigital number, since it uses as much as digits as its factorization.

26537890193 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2449440, while the sum is 53.

The spelling of 26537890193 in words is "twenty-six billion, five hundred thirty-seven million, eight hundred ninety thousand, one hundred ninety-three".