42171456512 has 44 divisors (see below), whose sum is σ = 84497310576. Its totient is φ = 21036810240.

The previous prime is 42171456433. The next prime is 42171456541. The reversal of 42171456512 is 21565417124.

It is a super-2 number, since 2×42171456512² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 395837 + ... + 490947.

Almost surely, 2^42171456512 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 42171456512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42248655288).

42171456512 is an abundant number, since it is smaller than the sum of its proper divisors (42325854064).

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

42171456512 is an equidigital number, since it uses as much as digits as its factorization.

42171456512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95564 (or 95546 counting only the distinct ones).

The product of its digits is 67200, while the sum is 38.

The spelling of 42171456512 in words is "forty-two billion, one hundred seventy-one million, four hundred fifty-six thousand, five hundred twelve".