155541565 has 8 divisors (see below), whose sum is σ = 190621440. Its totient is φ = 121785552.

The previous prime is 155541563. The next prime is 155541623. The reversal of 155541565 is 565145551.

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

It is a cyclic number.

It is not a de Polignac number, because 155541565 - 2¹ = 155541563 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155541563) 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, 330705 + ... + 331174.

It is an arithmetic number, because the mean of its divisors is an integer number (23827680).

Almost surely, 2^155541565 is an apocalyptic number.

It is an amenable number.

155541565 is a deficient number, since it is larger than the sum of its proper divisors (35079875).

155541565 is an equidigital number, since it uses as much as digits as its factorization.

155541565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 661931.

The product of its digits is 75000, while the sum is 37.

The square root of 155541565 is about 12471.6304066469. The cubic root of 155541565 is about 537.7934247892.

The spelling of 155541565 in words is "one hundred fifty-five million, five hundred forty-one thousand, five hundred sixty-five".