155856065 has 16 divisors (see below), whose sum is σ = 193591296. Its totient is φ = 120331200.

The previous prime is 155856053. The next prime is 155856067. The reversal of 155856065 is 560658551.

It is not a de Polignac number, because 155856065 - 2⁴ = 155856049 is a prime.

It is a super-2 number, since 2×155856065² = 48582225994568450, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (155856067) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 65639 + ... + 67971.

It is an arithmetic number, because the mean of its divisors is an integer number (12099456).

Almost surely, 2^155856065 is an apocalyptic number.

It is an amenable number.

155856065 is a deficient number, since it is larger than the sum of its proper divisors (37735231).

155856065 is a wasteful number, since it uses less digits than its factorization.

155856065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2800.

The product of its (nonzero) digits is 180000, while the sum is 41.

The square root of 155856065 is about 12484.2326556341. The cubic root of 155856065 is about 538.1556477190.

The spelling of 155856065 in words is "one hundred fifty-five million, eight hundred fifty-six thousand, sixty-five".