78148974887 has 2 divisors, whose sum is σ = 78148974888. Its totient is φ = 78148974886.

The previous prime is 78148974829. The next prime is 78148974889. The reversal of 78148974887 is 78847984187.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 78148974887 - 2¹⁰ = 78148973863 is a prime.

It is a super-2 number, since 2×78148974887² (a number of 23 digits) contains 22 as substring.

Together with 78148974889, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 78148974887.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78148974889) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39074487443 + 39074487444.

It is an arithmetic number, because the mean of its divisors is an integer number (39074487444).

Almost surely, 2^78148974887 is an apocalyptic number.

78148974887 is a deficient number, since it is larger than the sum of its proper divisors (1).

78148974887 is an equidigital number, since it uses as much as digits as its factorization.

78148974887 is an evil number, because the sum of its binary digits is even.

The product of its digits is 202309632, while the sum is 71.

The spelling of 78148974887 in words is "seventy-eight billion, one hundred forty-eight million, nine hundred seventy-four thousand, eight hundred eighty-seven".