155606556 has 36 divisors (see below), whose sum is σ = 422362248. Its totient is φ = 44458848.

The previous prime is 155606543. The next prime is 155606567. The reversal of 155606556 is 655606551.

It is a super-2 number, since 2×155606556² = 48426800540362272, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 131731 + ... + 132906.

Almost surely, 2^155606556 is an apocalyptic number.

It is an amenable number.

155606556 is an abundant number, since it is smaller than the sum of its proper divisors (266755692).

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

155606556 is a wasteful number, since it uses less digits than its factorization.

155606556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 264658 (or 264649 counting only the distinct ones).

The product of its (nonzero) digits is 135000, while the sum is 39.

The square root of 155606556 is about 12474.2356880091. The cubic root of 155606556 is about 537.8683176655.

The spelling of 155606556 in words is "one hundred fifty-five million, six hundred six thousand, five hundred fifty-six".