155999600 has 30 divisors (see below), whose sum is σ = 374790000. Its totient is φ = 62399680.

The previous prime is 155999587. The next prime is 155999603. The reversal of 155999600 is 6999551.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155999603) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 194600 + ... + 195399.

It is an arithmetic number, because the mean of its divisors is an integer number (12493000).

Almost surely, 2^155999600 is an apocalyptic number.

155999600 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

155999600 is an abundant number, since it is smaller than the sum of its proper divisors (218790400).

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

155999600 is a wasteful number, since it uses less digits than its factorization.

155999600 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 390017 (or 390006 counting only the distinct ones).

The product of its (nonzero) digits is 109350, while the sum is 44.

The square root of 155999600 is about 12489.9799839712. The cubic root of 155999600 is about 538.3208011047.

The spelling of 155999600 in words is "one hundred fifty-five million, nine hundred ninety-nine thousand, six hundred".