7218158465 has 16 divisors (see below), whose sum is σ = 9940275840. Its totient is φ = 4929050880.

The previous prime is 7218158461. The next prime is 7218158477. The reversal of 7218158465 is 5648518127.

It is not a de Polignac number, because 7218158465 - 2² = 7218158461 is a prime.

It is not an unprimeable number, because it can be changed into a prime (7218158461) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 419435 + ... + 436304.

It is an arithmetic number, because the mean of its divisors is an integer number (621267240).

Almost surely, 2^7218158465 is an apocalyptic number.

It is an amenable number.

7218158465 is a deficient number, since it is larger than the sum of its proper divisors (2722117375).

7218158465 is a wasteful number, since it uses less digits than its factorization.

7218158465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 855992.

The product of its digits is 537600, while the sum is 47.

The square root of 7218158465 is about 84959.7461448656. The cubic root of 7218158465 is about 1932.6007217443.

The spelling of 7218158465 in words is "seven billion, two hundred eighteen million, one hundred fifty-eight thousand, four hundred sixty-five".