155656 has 8 divisors (see below), whose sum is σ = 291870. Its totient is φ = 77824.

The previous prime is 155653. The next prime is 155657. The reversal of 155656 is 656551.

It can be written as a sum of positive squares in only one way, i.e., 111556 + 44100 = 334^2 + 210^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (155653) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9721 + ... + 9736.

2¹⁵⁵⁶⁵⁶ is an apocalyptic number.

It is an amenable number.

155656 is a deficient number, since it is larger than the sum of its proper divisors (136214).

155656 is a wasteful number, since it uses less digits than its factorization.

155656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19463 (or 19459 counting only the distinct ones).

The product of its digits is 4500, while the sum is 28.

The square root of 155656 is about 394.5326348986. The cubic root of 155656 is about 53.7925280871.

It can be divided in two parts, 15 and 5656, that added together give a triangular number (5671 = T₁₀₆).

The spelling of 155656 in words is "one hundred fifty-five thousand, six hundred fifty-six".