421678458729 has 24 divisors (see below), whose sum is σ = 699434767200. Its totient is φ = 242112032640.

The previous prime is 421678458709. The next prime is 421678458743. The reversal of 421678458729 is 927854876124.

It is a happy number.

421678458729 is a `hidden beast` number, since 4 + 21 + 6 + 7 + 8 + 4 + 587 + 29 = 666.

It is not a de Polignac number, because 421678458729 - 2⁵ = 421678458697 is a prime.

It is not an unprimeable number, because it can be changed into a prime (421678458709) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 112087024 + ... + 112090785.

It is an arithmetic number, because the mean of its divisors is an integer number (29143115300).

Almost surely, 2^421678458729 is an apocalyptic number.

It is an amenable number.

421678458729 is a deficient number, since it is larger than the sum of its proper divisors (277756308471).

421678458729 is a wasteful number, since it uses less digits than its factorization.

421678458729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 224177845 (or 224177842 counting only the distinct ones).

The product of its digits is 54190080, while the sum is 63.

The spelling of 421678458729 in words is "four hundred twenty-one billion, six hundred seventy-eight million, four hundred fifty-eight thousand, seven hundred twenty-nine".