155678863 has 2 divisors, whose sum is σ = 155678864. Its totient is φ = 155678862.

The previous prime is 155678849. The next prime is 155678879. The reversal of 155678863 is 368876551.

It is a weak prime.

It is an emirp because it is prime and its reverse (368876551) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-155678863 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (155678563) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77839431 + 77839432.

It is an arithmetic number, because the mean of its divisors is an integer number (77839432).

Almost surely, 2^155678863 is an apocalyptic number.

155678863 is a deficient number, since it is larger than the sum of its proper divisors (1).

155678863 is an equidigital number, since it uses as much as digits as its factorization.

155678863 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1209600, while the sum is 49.

The square root of 155678863 is about 12477.1336051194. The cubic root of 155678863 is about 537.9516166879.

The spelling of 155678863 in words is "one hundred fifty-five million, six hundred seventy-eight thousand, eight hundred sixty-three".