26537890163 has 4 divisors (see below), whose sum is σ = 27393951168. Its totient is φ = 25681829160.

The previous prime is 26537890129. The next prime is 26537890189. The reversal of 26537890163 is 36109873562.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 26537890163 - 2⁸ = 26537889907 is a prime.

It is a super-2 number, since 2×26537890163² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26537890193) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 428030456 + ... + 428030517.

It is an arithmetic number, because the mean of its divisors is an integer number (6848487792).

Almost surely, 2^26537890163 is an apocalyptic number.

26537890163 is a deficient number, since it is larger than the sum of its proper divisors (856061005).

26537890163 is an equidigital number, since it uses as much as digits as its factorization.

26537890163 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 856061004.

The product of its (nonzero) digits is 1632960, while the sum is 50.

The spelling of 26537890163 in words is "twenty-six billion, five hundred thirty-seven million, eight hundred ninety thousand, one hundred sixty-three".