155365663 has 2 divisors, whose sum is σ = 155365664. Its totient is φ = 155365662.

The previous prime is 155365649. The next prime is 155365729. The reversal of 155365663 is 366563551.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 155365663 - 2¹⁷ = 155234591 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (155369663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77682831 + 77682832.

It is an arithmetic number, because the mean of its divisors is an integer number (77682832).

Almost surely, 2^155365663 is an apocalyptic number.

155365663 is a deficient number, since it is larger than the sum of its proper divisors (1).

155365663 is an equidigital number, since it uses as much as digits as its factorization.

155365663 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 243000, while the sum is 40.

The square root of 155365663 is about 12464.5763265343. The cubic root of 155365663 is about 537.5906180730.

The spelling of 155365663 in words is "one hundred fifty-five million, three hundred sixty-five thousand, six hundred sixty-three".