155505065 has 16 divisors (see below), whose sum is σ = 190850688. Its totient is φ = 121606656.

The previous prime is 155505041. The next prime is 155505109. The reversal of 155505065 is 560505551.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-155505065 is a prime.

It is a Duffinian 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, 38324 + ... + 42186.

It is an arithmetic number, because the mean of its divisors is an integer number (11928168).

Almost surely, 2^155505065 is an apocalyptic number.

It is an amenable number.

155505065 is a deficient number, since it is larger than the sum of its proper divisors (35345623).

155505065 is an equidigital number, since it uses as much as digits as its factorization.

155505065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4048.

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

The square root of 155505065 is about 12470.1669996837. The cubic root of 155505065 is about 537.7513545862.

The spelling of 155505065 in words is "one hundred fifty-five million, five hundred five thousand, sixty-five".