78077124947 has 2 divisors, whose sum is σ = 78077124948. Its totient is φ = 78077124946.

The previous prime is 78077124919. The next prime is 78077125013. The reversal of 78077124947 is 74942177087.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 78077124947 - 2⁶ = 78077124883 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 78077124892 and 78077124901.

It is not a weakly prime, because it can be changed into another prime (78077174947) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39038562473 + 39038562474.

It is an arithmetic number, because the mean of its divisors is an integer number (39038562474).

Almost surely, 2^78077124947 is an apocalyptic number.

78077124947 is a deficient number, since it is larger than the sum of its proper divisors (1).

78077124947 is an equidigital number, since it uses as much as digits as its factorization.

78077124947 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5531904, while the sum is 56.

The spelling of 78077124947 in words is "seventy-eight billion, seventy-seven million, one hundred twenty-four thousand, nine hundred forty-seven".