55660671421572 has 72 divisors (see below), whose sum is σ = 159030489807840. Its totient is φ = 15066046396800.

The previous prime is 55660671421571. The next prime is 55660671421577. The reversal of 55660671421572 is 27512417606655.

It is a super-2 number, since 2×55660671421572² (a number of 28 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is not an unprimeable number, because it can be changed into a prime (55660671421571) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 2491067929 + ... + 2491090272.

Almost surely, 2^{55660671421572} is an apocalyptic number.

It is an amenable number.

55660671421572 is an abundant number, since it is smaller than the sum of its proper divisors (103369818386268).

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

55660671421572 is a wasteful number, since it uses less digits than its factorization.

55660671421572 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4982158241 (or 4982158232 counting only the distinct ones).

The product of its (nonzero) digits is 21168000, while the sum is 57.

The spelling of 55660671421572 in words is "fifty-five trillion, six hundred sixty billion, six hundred seventy-one million, four hundred twenty-one thousand, five hundred seventy-two".