1556655655 has 8 divisors (see below), whose sum is σ = 1966302000. Its totient is φ = 1179781056.

The previous prime is 1556655619. The next prime is 1556655679. The reversal of 1556655655 is 5565566551.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1556655655 - 2⁹ = 1556655143 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1556655599 and 1556655608.

It is a congruent number.

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, 8192830 + ... + 8193019.

It is an arithmetic number, because the mean of its divisors is an integer number (245787750).

Almost surely, 2^1556655655 is an apocalyptic number.

1556655655 is a deficient number, since it is larger than the sum of its proper divisors (409646345).

1556655655 is a wasteful number, since it uses less digits than its factorization.

1556655655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16385873.

The product of its digits is 3375000, while the sum is 49.

The square root of 1556655655 is about 39454.4757283632. The cubic root of 1556655655 is about 1158.9486250018.

The spelling of 1556655655 in words is "one billion, five hundred fifty-six million, six hundred fifty-five thousand, six hundred fifty-five".