55661421060 has 144 divisors (see below), whose sum is σ = 195603198336. Its totient is φ = 12548307456.

The previous prime is 55661421037. The next prime is 55661421107. The reversal of 55661421060 is 6012416655.

55661421060 is a `hidden beast` number, since 5 + 566 + 14 + 21 + 0 + 60 = 666.

55661421060 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×55661421060² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 210594 + ... + 394553.

It is an arithmetic number, because the mean of its divisors is an integer number (1358355544).

Almost surely, 2^55661421060 is an apocalyptic number.

It is an amenable number.

55661421060 is an abundant number, since it is smaller than the sum of its proper divisors (139941777276).

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

55661421060 is a wasteful number, since it uses less digits than its factorization.

55661421060 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 605242 (or 605237 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 36.

The spelling of 55661421060 in words is "fifty-five billion, six hundred sixty-one million, four hundred twenty-one thousand, sixty".