7868404618 has 4 divisors (see below), whose sum is σ = 11802606930. Its totient is φ = 3934202308.

The previous prime is 7868404603. The next prime is 7868404619. The reversal of 7868404618 is 8164048687.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 7573698729 + 294705889 = 87027^2 + 17167^2 .

It is not an unprimeable number, because it can be changed into a prime (7868404619) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1967101153 + ... + 1967101156.

Almost surely, 2^7868404618 is an apocalyptic number.

7868404618 is a deficient number, since it is larger than the sum of its proper divisors (3934202312).

7868404618 is a wasteful number, since it uses less digits than its factorization.

7868404618 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3934202311.

The product of its (nonzero) digits is 2064384, while the sum is 52.

The square root of 7868404618 is about 88704.0281948909. The cubic root of 7868404618 is about 1988.9730328994.

The spelling of 7868404618 in words is "seven billion, eight hundred sixty-eight million, four hundred four thousand, six hundred eighteen".