716641745 has 4 divisors (see below), whose sum is σ = 859970100. Its totient is φ = 573313392.

The previous prime is 716641733. The next prime is 716641781. The reversal of 716641745 is 547146617.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 547146617 = 251 ⋅2179867.

It can be written as a sum of positive squares in 2 ways, for example, as 181737361 + 534904384 = 13481^2 + 23128^2 .

It is a cyclic number.

It is not a de Polignac number, because 716641745 - 2⁸ = 716641489 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 71664170 + ... + 71664179.

It is an arithmetic number, because the mean of its divisors is an integer number (214992525).

Almost surely, 2^716641745 is an apocalyptic number.

It is an amenable number.

716641745 is a deficient number, since it is larger than the sum of its proper divisors (143328355).

716641745 is a wasteful number, since it uses less digits than its factorization.

716641745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143328354.

The product of its digits is 141120, while the sum is 41.

The square root of 716641745 is about 26770.1652030764. The cubic root of 716641745 is about 894.8852864222.

The spelling of 716641745 in words is "seven hundred sixteen million, six hundred forty-one thousand, seven hundred forty-five".