155132644 has 24 divisors (see below), whose sum is σ = 289225440. Its totient is φ = 72595584.

The previous prime is 155132641. The next prime is 155132651. The reversal of 155132644 is 446231551.

It is a happy number.

155132644 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×155132644² = 48132274468861472, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (155132641) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5989 + ... + 18604.

It is an arithmetic number, because the mean of its divisors is an integer number (12051060).

Almost surely, 2^155132644 is an apocalyptic number.

It is an amenable number.

155132644 is a deficient number, since it is larger than the sum of its proper divisors (134092796).

155132644 is a wasteful number, since it uses less digits than its factorization.

155132644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24699 (or 24697 counting only the distinct ones).

The product of its digits is 14400, while the sum is 31.

The square root of 155132644 is about 12455.2255700168. The cubic root of 155132644 is about 537.3217223069.

The spelling of 155132644 in words is "one hundred fifty-five million, one hundred thirty-two thousand, six hundred forty-four".