155005565 has 16 divisors (see below), whose sum is σ = 218526336. Its totient is φ = 104059200.

The previous prime is 155005547. The next prime is 155005573. The reversal of 155005565 is 565500551.

It is not a de Polignac number, because 155005565 - 2⁸ = 155005309 is a prime.

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 15 ways as a sum of consecutive naturals, for example, 107681 + ... + 109110.

It is an arithmetic number, because the mean of its divisors is an integer number (13657896).

Almost surely, 2^155005565 is an apocalyptic number.

It is an amenable number.

155005565 is a deficient number, since it is larger than the sum of its proper divisors (63520771).

155005565 is a wasteful number, since it uses less digits than its factorization.

155005565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 216820.

The product of its (nonzero) digits is 18750, while the sum is 32.

The square root of 155005565 is about 12450.1230917610. The cubic root of 155005565 is about 537.1749641120.

The spelling of 155005565 in words is "one hundred fifty-five million, five thousand, five hundred sixty-five".