719116640257 has 4 divisors (see below), whose sum is σ = 719118575316. Its totient is φ = 719114705200.

The previous prime is 719116640243. The next prime is 719116640269. The reversal of 719116640257 is 752046611917.

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

It can be written as a sum of positive squares in 2 ways, for example, as 50751528961 + 668365111296 = 225281^2 + 817536^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-719116640257 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 719116640257.

It is not an unprimeable number, because it can be changed into a prime (719116640857) 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, 214978 + ... + 1218379.

It is an arithmetic number, because the mean of its divisors is an integer number (179779643829).

Almost surely, 2^719116640257 is an apocalyptic number.

It is an amenable number.

719116640257 is a deficient number, since it is larger than the sum of its proper divisors (1935059).

719116640257 is a wasteful number, since it uses less digits than its factorization.

719116640257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1935058.

The product of its (nonzero) digits is 635040, while the sum is 49.

The spelling of 719116640257 in words is "seven hundred nineteen billion, one hundred sixteen million, six hundred forty thousand, two hundred fifty-seven".