718457137668 has 36 divisors (see below), whose sum is σ = 1819247526460. Its totient is φ = 239070652416.

The previous prime is 718457137667. The next prime is 718457137693. The reversal of 718457137668 is 866731754817.

It can be written as a sum of positive squares in 2 ways, for example, as 663625295424 + 54831842244 = 814632^2 + 234162^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is not an unprimeable number, because it can be changed into a prime (718457137667) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 17273113 + ... + 17314656.

Almost surely, 2^718457137668 is an apocalyptic number.

It is an amenable number.

718457137668 is an abundant number, since it is smaller than the sum of its proper divisors (1100790388792).

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

718457137668 is a wasteful number, since it uses less digits than its factorization.

718457137668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34588356 (or 34588351 counting only the distinct ones).

The product of its digits is 47416320, while the sum is 63.

The spelling of 718457137668 in words is "seven hundred eighteen billion, four hundred fifty-seven million, one hundred thirty-seven thousand, six hundred sixty-eight".