155999364 has 12 divisors (see below), whose sum is σ = 363998544. Its totient is φ = 51999784.

The previous prime is 155999357. The next prime is 155999401. The reversal of 155999364 is 463999551.

It is a tau number, because it is divible by the number of its divisors (12).

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 6499962 + ... + 6499985.

It is an arithmetic number, because the mean of its divisors is an integer number (30333212).

Almost surely, 2^155999364 is an apocalyptic number.

It is an amenable number.

155999364 is an abundant number, since it is smaller than the sum of its proper divisors (207999180).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

155999364 is a wasteful number, since it uses less digits than its factorization.

155999364 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12999954 (or 12999952 counting only the distinct ones).

The product of its digits is 1312200, while the sum is 51.

The square root of 155999364 is about 12489.9705363944. The cubic root of 155999364 is about 538.3205296429.

The spelling of 155999364 in words is "one hundred fifty-five million, nine hundred ninety-nine thousand, three hundred sixty-four".