55721830684 has 12 divisors (see below), whose sum is σ = 105014219464. Its totient is φ = 25717767984.

The previous prime is 55721830663. The next prime is 55721830721. The reversal of 55721830684 is 48603812755.

It is a happy number.

It is a hoax number, since the sum of its digits (49) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 535786782 + ... + 535786885.

Almost surely, 2^55721830684 is an apocalyptic number.

It is an amenable number.

55721830684 is a deficient number, since it is larger than the sum of its proper divisors (49292388780).

55721830684 is a wasteful number, since it uses less digits than its factorization.

55721830684 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1071573684 (or 1071573682 counting only the distinct ones).

The product of its (nonzero) digits is 1612800, while the sum is 49.

The spelling of 55721830684 in words is "fifty-five billion, seven hundred twenty-one million, eight hundred thirty thousand, six hundred eighty-four".