78501722430713 has 2 divisors, whose sum is σ = 78501722430714. Its totient is φ = 78501722430712.

The previous prime is 78501722430671. The next prime is 78501722430737. The reversal of 78501722430713 is 31703422710587.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 63222090317824 + 15279632112889 = 7951232^2 + 3908917^2 .

It is a cyclic number.

It is not a de Polignac number, because 78501722430713 - 2²⁸ = 78501453995257 is a prime.

It is a super-2 number, since 2×78501722430713² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (78501722430793) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39250861215356 + 39250861215357.

It is an arithmetic number, because the mean of its divisors is an integer number (39250861215357).

Almost surely, 2^{78501722430713} is an apocalyptic number.

It is an amenable number.

78501722430713 is a deficient number, since it is larger than the sum of its proper divisors (1).

78501722430713 is an equidigital number, since it uses as much as digits as its factorization.

78501722430713 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1975680, while the sum is 50.

The spelling of 78501722430713 in words is "seventy-eight trillion, five hundred one billion, seven hundred twenty-two million, four hundred thirty thousand, seven hundred thirteen".