764216725387 has 4 divisors (see below), whose sum is σ = 768634163280. Its totient is φ = 759799287496.

The previous prime is 764216725373. The next prime is 764216725403. The reversal of 764216725387 is 783527612467.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-764216725387 is a prime.

It is a super-2 number, since 2×764216725387² (a number of 25 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (764216729387) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2208718687 + ... + 2208719032.

It is an arithmetic number, because the mean of its divisors is an integer number (192158540820).

Almost surely, 2^764216725387 is an apocalyptic number.

764216725387 is a deficient number, since it is larger than the sum of its proper divisors (4417437893).

764216725387 is a wasteful number, since it uses less digits than its factorization.

764216725387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4417437892.

The product of its digits is 23708160, while the sum is 58.

The spelling of 764216725387 in words is "seven hundred sixty-four billion, two hundred sixteen million, seven hundred twenty-five thousand, three hundred eighty-seven".