155682649 has 2 divisors, whose sum is σ = 155682650. Its totient is φ = 155682648.

The previous prime is 155682619. The next prime is 155682679. The reversal of 155682649 is 946286551.

155682649 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a balanced prime because it is at equal distance from previous prime (155682619) and next prime (155682679).

It can be written as a sum of positive squares in only one way, i.e., 147185424 + 8497225 = 12132^2 + 2915^2 .

It is a cyclic number.

It is not a de Polignac number, because 155682649 - 2¹⁷ = 155551577 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 155682599 and 155682608.

It is not a weakly prime, because it can be changed into another prime (155682619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77841324 + 77841325.

It is an arithmetic number, because the mean of its divisors is an integer number (77841325).

Almost surely, 2^155682649 is an apocalyptic number.

It is an amenable number.

155682649 is a deficient number, since it is larger than the sum of its proper divisors (1).

155682649 is an equidigital number, since it uses as much as digits as its factorization.

155682649 is an evil number, because the sum of its binary digits is even.

The product of its digits is 518400, while the sum is 46.

The square root of 155682649 is about 12477.2853217357. The cubic root of 155682649 is about 537.9559775203.

The spelling of 155682649 in words is "one hundred fifty-five million, six hundred eighty-two thousand, six hundred forty-nine".