3961545618 has 16 divisors (see below), whose sum is σ = 7923756096. Its totient is φ = 1320404400.

The previous prime is 3961545617. The next prime is 3961545641. The reversal of 3961545618 is 8165451693.

It is not an unprimeable number, because it can be changed into a prime (3961545617) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 85080 + ... + 123132.

It is an arithmetic number, because the mean of its divisors is an integer number (495234756).

Almost surely, 2^3961545618 is an apocalyptic number.

3961545618 is an abundant number, since it is smaller than the sum of its proper divisors (3962210478).

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

3961545618 is a wasteful number, since it uses less digits than its factorization.

3961545618 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55409.

The product of its digits is 777600, while the sum is 48.

The square root of 3961545618 is about 62940.8104332952. The cubic root of 3961545618 is about 1582.2977860809.

The spelling of 3961545618 in words is "three billion, nine hundred sixty-one million, five hundred forty-five thousand, six hundred eighteen".