26161618 has 8 divisors (see below), whose sum is σ = 44848512. Its totient is φ = 11212116.

The previous prime is 26161609. The next prime is 26161621. The reversal of 26161618 is 81616162.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 26161618.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 934330 + ... + 934357.

It is an arithmetic number, because the mean of its divisors is an integer number (5606064).

Almost surely, 2^26161618 is an apocalyptic number.

26161618 is a deficient number, since it is larger than the sum of its proper divisors (18686894).

26161618 is a wasteful number, since it uses less digits than its factorization.

26161618 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1868696.

The product of its digits is 3456, while the sum is 31.

The square root of 26161618 is about 5114.8429105888. The cubic root of 26161618 is about 296.8621761109.

The spelling of 26161618 in words is "twenty-six million, one hundred sixty-one thousand, six hundred eighteen".