971145618 has 32 divisors (see below), whose sum is σ = 2007624192. Its totient is φ = 312854400.

The previous prime is 971145607. The next prime is 971145677. The reversal of 971145618 is 816541179.

It is a super-2 number, since 2×971145618² = 1886247622721203848, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 971145618.

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 15 ways as a sum of consecutive naturals, for example, 155598 + ... + 161718.

It is an arithmetic number, because the mean of its divisors is an integer number (62738256).

Almost surely, 2^971145618 is an apocalyptic number.

971145618 is an abundant number, since it is smaller than the sum of its proper divisors (1036478574).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

971145618 is a wasteful number, since it uses less digits than its factorization.

971145618 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7010.

The product of its digits is 60480, while the sum is 42.

The square root of 971145618 is about 31163.2093661741. The cubic root of 971145618 is about 990.2878522209.

The spelling of 971145618 in words is "nine hundred seventy-one million, one hundred forty-five thousand, six hundred eighteen".