1553941866 has 16 divisors (see below), whose sum is σ = 3271456800. Its totient is φ = 490718448.

The previous prime is 1553941849. The next prime is 1553941889. The reversal of 1553941866 is 6681493551.

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 7 ways as a sum of consecutive naturals, for example, 6815421 + ... + 6815648.

It is an arithmetic number, because the mean of its divisors is an integer number (204466050).

Almost surely, 2^1553941866 is an apocalyptic number.

1553941866 is an abundant number, since it is smaller than the sum of its proper divisors (1717514934).

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

1553941866 is a wasteful number, since it uses less digits than its factorization.

1553941866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13631093.

The product of its digits is 777600, while the sum is 48.

The square root of 1553941866 is about 39420.0693302282. The cubic root of 1553941866 is about 1158.2747505363.

The spelling of 1553941866 in words is "one billion, five hundred fifty-three million, nine hundred forty-one thousand, eight hundred sixty-six".