719716123649 has 2 divisors, whose sum is σ = 719716123650. Its totient is φ = 719716123648.

The previous prime is 719716123589. The next prime is 719716123667. The reversal of 719716123649 is 946321617917.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 591976360000 + 127739763649 = 769400^2 + 357407^2 .

It is a cyclic number.

It is not a de Polignac number, because 719716123649 - 2¹² = 719716119553 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 719716123594 and 719716123603.

It is not a weakly prime, because it can be changed into another prime (719716123949) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 359858061824 + 359858061825.

It is an arithmetic number, because the mean of its divisors is an integer number (359858061825).

Almost surely, 2^719716123649 is an apocalyptic number.

It is an amenable number.

719716123649 is a deficient number, since it is larger than the sum of its proper divisors (1).

719716123649 is an equidigital number, since it uses as much as digits as its factorization.

719716123649 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3429216, while the sum is 56.

The spelling of 719716123649 in words is "seven hundred nineteen billion, seven hundred sixteen million, one hundred twenty-three thousand, six hundred forty-nine".