78882038041691 has 2 divisors, whose sum is σ = 78882038041692. Its totient is φ = 78882038041690.

The previous prime is 78882038041627. The next prime is 78882038041789. The reversal of 78882038041691 is 19614083028887.

It is a weak prime.

It is an emirp because it is prime and its reverse (19614083028887) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 78882038041691 - 2⁶ = 78882038041627 is a prime.

It is a super-2 number, since 2×78882038041691² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (78882038041591) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39441019020845 + 39441019020846.

It is an arithmetic number, because the mean of its divisors is an integer number (39441019020846).

Almost surely, 2^{78882038041691} is an apocalyptic number.

78882038041691 is a deficient number, since it is larger than the sum of its proper divisors (1).

78882038041691 is an equidigital number, since it uses as much as digits as its factorization.

78882038041691 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 37158912, while the sum is 65.

The spelling of 78882038041691 in words is "seventy-eight trillion, eight hundred eighty-two billion, thirty-eight million, forty-one thousand, six hundred ninety-one".