155306645 has 16 divisors (see below), whose sum is σ = 212511600. Its totient is φ = 107940864.

The previous prime is 155306623. The next prime is 155306651. The reversal of 155306645 is 546603551.

It can be written as a sum of positive squares in 8 ways, for example, as 17901361 + 137405284 = 4231^2 + 11722^2 .

It is a cyclic number.

It is not a de Polignac number, because 155306645 - 2⁶ = 155306581 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 69170 + ... + 71379.

It is an arithmetic number, because the mean of its divisors is an integer number (13281975).

Almost surely, 2^155306645 is an apocalyptic number.

It is an amenable number.

155306645 is a deficient number, since it is larger than the sum of its proper divisors (57204955).

155306645 is a wasteful number, since it uses less digits than its factorization.

155306645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140584.

The product of its (nonzero) digits is 54000, while the sum is 35.

The square root of 155306645 is about 12462.2086726230. The cubic root of 155306645 is about 537.5225388061.

The spelling of 155306645 in words is "one hundred fifty-five million, three hundred six thousand, six hundred forty-five".