127785420012 has 24 divisors (see below), whose sum is σ = 299831716800. Its totient is φ = 42357177616.

The previous prime is 127785419989. The next prime is 127785420019. The reversal of 127785420012 is 210024587721.

It is a super-2 number, since 2×127785420012² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (127785420019) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29743062 + ... + 29747357.

It is an arithmetic number, because the mean of its divisors is an integer number (12492988200).

Almost surely, 2^127785420012 is an apocalyptic number.

127785420012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

127785420012 is an abundant number, since it is smaller than the sum of its proper divisors (172046296788).

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

127785420012 is a wasteful number, since it uses less digits than its factorization.

127785420012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59490605 (or 59490603 counting only the distinct ones).

The product of its (nonzero) digits is 62720, while the sum is 39.

The spelling of 127785420012 in words is "one hundred twenty-seven billion, seven hundred eighty-five million, four hundred twenty thousand, twelve".