155593856 has 64 divisors (see below), whose sum is σ = 344066400. Its totient is φ = 69488640.

The previous prime is 155593847. The next prime is 155593861. The reversal of 155593856 is 658395551.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (64).

It is a self number, because there is not a number n which added to its sum of digits gives 155593856.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 82136 + ... + 84008.

Almost surely, 2^155593856 is an apocalyptic number.

155593856 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 155593856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (172033200).

155593856 is an abundant number, since it is smaller than the sum of its proper divisors (188472544).

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

155593856 is a wasteful number, since it uses less digits than its factorization.

155593856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1957 (or 1945 counting only the distinct ones).

The product of its digits is 810000, while the sum is 47.

The square root of 155593856 is about 12473.7266283978. The cubic root of 155593856 is about 537.8536843629.

The spelling of 155593856 in words is "one hundred fifty-five million, five hundred ninety-three thousand, eight hundred fifty-six".