78074923867 has 2 divisors, whose sum is σ = 78074923868. Its totient is φ = 78074923866.

The previous prime is 78074923859. The next prime is 78074923897. The reversal of 78074923867 is 76832947087.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 78074923867 - 2³ = 78074923859 is a prime.

It is not a weakly prime, because it can be changed into another prime (78074923897) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39037461933 + 39037461934.

It is an arithmetic number, because the mean of its divisors is an integer number (39037461934).

Almost surely, 2^78074923867 is an apocalyptic number.

78074923867 is a deficient number, since it is larger than the sum of its proper divisors (1).

78074923867 is an equidigital number, since it uses as much as digits as its factorization.

78074923867 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 28449792, while the sum is 61.

The spelling of 78074923867 in words is "seventy-eight billion, seventy-four million, nine hundred twenty-three thousand, eight hundred sixty-seven".