127777421406 has 32 divisors (see below), whose sum is σ = 258859353600. Its totient is φ = 42042012480.

The previous prime is 127777421381. The next prime is 127777421407. The reversal of 127777421406 is 604124777721.

127777421406 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (127777421407) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1828041 + ... + 1896651.

It is an arithmetic number, because the mean of its divisors is an integer number (8089354800).

Almost surely, 2^127777421406 is an apocalyptic number.

127777421406 is an abundant number, since it is smaller than the sum of its proper divisors (131081932194).

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

127777421406 is a wasteful number, since it uses less digits than its factorization.

127777421406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72624.

The product of its (nonzero) digits is 921984, while the sum is 48.

The spelling of 127777421406 in words is "one hundred twenty-seven billion, seven hundred seventy-seven million, four hundred twenty-one thousand, four hundred six".