1655389556 has 12 divisors (see below), whose sum is σ = 2906248800. Its totient is φ = 825032760.

The previous prime is 1655389543. The next prime is 1655389577. The reversal of 1655389556 is 6559835561.

It is a super-2 number, since 2×1655389556² = 5480629164227754272, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1655389498 and 1655389507.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 664106 + ... + 666593.

It is an arithmetic number, because the mean of its divisors is an integer number (242187400).

Almost surely, 2^1655389556 is an apocalyptic number.

It is an amenable number.

1655389556 is a deficient number, since it is larger than the sum of its proper divisors (1250859244).

1655389556 is a wasteful number, since it uses less digits than its factorization.

1655389556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1331014 (or 1331012 counting only the distinct ones).

The product of its digits is 4860000, while the sum is 53.

The square root of 1655389556 is about 40686.4787859554. The cubic root of 1655389556 is about 1182.9509488728.

The spelling of 1655389556 in words is "one billion, six hundred fifty-five million, three hundred eighty-nine thousand, five hundred fifty-six".