153638645 has 4 divisors (see below), whose sum is σ = 184366380. Its totient is φ = 122910912.

The previous prime is 153638633. The next prime is 153638651. The reversal of 153638645 is 546836351.

153638645 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 75881521 + 77757124 = 8711^2 + 8818^2 .

It is a cyclic number.

It is not a de Polignac number, because 153638645 - 2⁶ = 153638581 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15363860 + ... + 15363869.

It is an arithmetic number, because the mean of its divisors is an integer number (46091595).

Almost surely, 2^153638645 is an apocalyptic number.

It is an amenable number.

153638645 is a deficient number, since it is larger than the sum of its proper divisors (30727735).

153638645 is an equidigital number, since it uses as much as digits as its factorization.

153638645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30727734.

The product of its digits is 259200, while the sum is 41.

The square root of 153638645 is about 12395.1056873268. The cubic root of 153638645 is about 535.5912699044.

The spelling of 153638645 in words is "one hundred fifty-three million, six hundred thirty-eight thousand, six hundred forty-five".