7218058561 has 16 divisors (see below), whose sum is σ = 8885324800. Its totient is φ = 5724967248.

The previous prime is 7218058541. The next prime is 7218058591. The reversal of 7218058561 is 1658508127.

It is not a de Polignac number, because 7218058561 - 2⁹ = 7218058049 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7218058541) 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, 625341 + ... + 636778.

It is an arithmetic number, because the mean of its divisors is an integer number (555332800).

Almost surely, 2^7218058561 is an apocalyptic number.

It is an amenable number.

7218058561 is a deficient number, since it is larger than the sum of its proper divisors (1667266239).

7218058561 is a wasteful number, since it uses less digits than its factorization.

7218058561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1262188.

The product of its (nonzero) digits is 134400, while the sum is 43.

The square root of 7218058561 is about 84959.1581938051. The cubic root of 7218058561 is about 1932.5918055536.

The spelling of 7218058561 in words is "seven billion, two hundred eighteen million, fifty-eight thousand, five hundred sixty-one".