155449645 has 8 divisors (see below), whose sum is σ = 200888856. Its totient is φ = 114793536.

The previous prime is 155449607. The next prime is 155449681. The reversal of 155449645 is 546944551.

It can be written as a sum of positive squares in 4 ways, for example, as 4012009 + 151437636 = 2003^2 + 12306^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 155449645 - 2¹³ = 155441453 is a prime.

It is a super-3 number, since 3×155449645³ (a number of 26 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1195702 + ... + 1195831.

It is an arithmetic number, because the mean of its divisors is an integer number (25111107).

Almost surely, 2^155449645 is an apocalyptic number.

It is an amenable number.

155449645 is a deficient number, since it is larger than the sum of its proper divisors (45439211).

155449645 is a wasteful number, since it uses less digits than its factorization.

155449645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2391551.

The product of its digits is 432000, while the sum is 43.

The square root of 155449645 is about 12467.9446983053. The cubic root of 155449645 is about 537.6874644462.

The spelling of 155449645 in words is "one hundred fifty-five million, four hundred forty-nine thousand, six hundred forty-five".