26649134618 has 32 divisors (see below), whose sum is σ = 42897824208. Its totient is φ = 12371968000.

The previous prime is 26649134609. The next prime is 26649134641. The reversal of 26649134618 is 81643194662.

It can be written as a sum of positive squares in 8 ways, for example, as 17278313809 + 9370820809 = 131447^2 + 96803^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 951146 + ... + 978762.

Almost surely, 2^26649134618 is an apocalyptic number.

26649134618 is a deficient number, since it is larger than the sum of its proper divisors (16248689590).

26649134618 is a wasteful number, since it uses less digits than its factorization.

26649134618 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28018.

The product of its digits is 1492992, while the sum is 50.

The spelling of 26649134618 in words is "twenty-six billion, six hundred forty-nine million, one hundred thirty-four thousand, six hundred eighteen".