155132645 has 4 divisors (see below), whose sum is σ = 186159180. Its totient is φ = 124106112.

The previous prime is 155132641. The next prime is 155132651. The reversal of 155132645 is 546231551.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 546231551 = 19 ⋅28749029.

It can be written as a sum of positive squares in 2 ways, for example, as 16434916 + 138697729 = 4054^2 + 11777^2 .

It is a cyclic number.

It is not a de Polignac number, because 155132645 - 2² = 155132641 is a prime.

It is a super-2 number, since 2×155132645² = 48132275089392050, which contains 22 as substring.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 15513260 + ... + 15513269.

It is an arithmetic number, because the mean of its divisors is an integer number (46539795).

Almost surely, 2^155132645 is an apocalyptic number.

It is an amenable number.

155132645 is a deficient number, since it is larger than the sum of its proper divisors (31026535).

155132645 is an equidigital number, since it uses as much as digits as its factorization.

155132645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31026534.

The product of its digits is 18000, while the sum is 32.

The square root of 155132645 is about 12455.2256101606. The cubic root of 155132645 is about 537.3217234614.

The spelling of 155132645 in words is "one hundred fifty-five million, one hundred thirty-two thousand, six hundred forty-five".