1097726618 has 48 divisors (see below), whose sum is σ = 1852757280. Its totient is φ = 486845184.

The previous prime is 1097726599. The next prime is 1097726627. The reversal of 1097726618 is 8166277901.

It is a Smith number, since the sum of its digits (47) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 720005 + ... + 721527.

It is an arithmetic number, because the mean of its divisors is an integer number (38599110).

Almost surely, 2^1097726618 is an apocalyptic number.

1097726618 is a deficient number, since it is larger than the sum of its proper divisors (755030662).

1097726618 is a wasteful number, since it uses less digits than its factorization.

1097726618 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1631 (or 1614 counting only the distinct ones).

The product of its (nonzero) digits is 254016, while the sum is 47.

The square root of 1097726618 is about 33131.9576542045. The cubic root of 1097726618 is about 1031.5684834598.

The spelling of 1097726618 in words is "one billion, ninety-seven million, seven hundred twenty-six thousand, six hundred eighteen".