78992280919 has 2 divisors, whose sum is σ = 78992280920. Its totient is φ = 78992280918.

The previous prime is 78992280901. The next prime is 78992280923. The reversal of 78992280919 is 91908229987.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 78992280919 - 2¹⁵ = 78992248151 is a prime.

It is a super-2 number, since 2×78992280919² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78992280979) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39496140459 + 39496140460.

It is an arithmetic number, because the mean of its divisors is an integer number (39496140460).

Almost surely, 2^78992280919 is an apocalyptic number.

78992280919 is a deficient number, since it is larger than the sum of its proper divisors (1).

78992280919 is an equidigital number, since it uses as much as digits as its factorization.

78992280919 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11757312, while the sum is 64.

The spelling of 78992280919 in words is "seventy-eight billion, nine hundred ninety-two million, two hundred eighty thousand, nine hundred nineteen".