78892538047 has 2 divisors, whose sum is σ = 78892538048. Its totient is φ = 78892538046.

The previous prime is 78892537961. The next prime is 78892538059. The reversal of 78892538047 is 74083529887.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78892538047 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78892538447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39446269023 + 39446269024.

It is an arithmetic number, because the mean of its divisors is an integer number (39446269024).

Almost surely, 2^78892538047 is an apocalyptic number.

78892538047 is a deficient number, since it is larger than the sum of its proper divisors (1).

78892538047 is an equidigital number, since it uses as much as digits as its factorization.

78892538047 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 27095040, while the sum is 61.

The spelling of 78892538047 in words is "seventy-eight billion, eight hundred ninety-two million, five hundred thirty-eight thousand, forty-seven".