155646487 has 2 divisors, whose sum is σ = 155646488. Its totient is φ = 155646486.

The previous prime is 155646467. The next prime is 155646521. The reversal of 155646487 is 784646551.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 155646487 - 2¹¹ = 155644439 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (155646467) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77823243 + 77823244.

It is an arithmetic number, because the mean of its divisors is an integer number (77823244).

Almost surely, 2^155646487 is an apocalyptic number.

155646487 is a deficient number, since it is larger than the sum of its proper divisors (1).

155646487 is an equidigital number, since it uses as much as digits as its factorization.

155646487 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 806400, while the sum is 46.

The square root of 155646487 is about 12475.8361242844. The cubic root of 155646487 is about 537.9143221173.

It can be divided in two parts, 1556464 and 87, that added together give a palindrome (1556551).

The spelling of 155646487 in words is "one hundred fifty-five million, six hundred forty-six thousand, four hundred eighty-seven".