718551324321 has 16 divisors (see below), whose sum is σ = 1018586295936. Its totient is φ = 449561230976.

The previous prime is 718551324251. The next prime is 718551324329. The reversal of 718551324321 is 123423155817.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 718551324321 - 2³⁵ = 684191585953 is a prime.

It is a super-2 number, since 2×718551324321² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (718551324329) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 98239620 + ... + 98246933.

It is an arithmetic number, because the mean of its divisors is an integer number (63661643496).

Almost surely, 2^718551324321 is an apocalyptic number.

It is an amenable number.

718551324321 is a deficient number, since it is larger than the sum of its proper divisors (300034971615).

718551324321 is a wasteful number, since it uses less digits than its factorization.

718551324321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 196486632.

The product of its digits is 201600, while the sum is 42.

The spelling of 718551324321 in words is "seven hundred eighteen billion, five hundred fifty-one million, three hundred twenty-four thousand, three hundred twenty-one".