42171782612680 has 128 divisors (see below), whose sum is σ = 114051920762880. Its totient is φ = 13728471644160.

The previous prime is 42171782612657. The next prime is 42171782612719. The reversal of 42171782612680 is 8621628717124.

It is a happy number.

It is a super-2 number, since 2×42171782612680² (a number of 28 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 45374869 + ... + 46294948.

It is an arithmetic number, because the mean of its divisors is an integer number (891030630960).

Almost surely, 2^{42171782612680} is an apocalyptic number.

42171782612680 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

42171782612680 is an abundant number, since it is smaller than the sum of its proper divisors (71880138150200).

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

42171782612680 is a wasteful number, since it uses less digits than its factorization.

42171782612680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91669919 (or 91669915 counting only the distinct ones).

The product of its (nonzero) digits is 3612672, while the sum is 55.

The spelling of 42171782612680 in words is "forty-two trillion, one hundred seventy-one billion, seven hundred eighty-two million, six hundred twelve thousand, six hundred eighty".