421980218719770 has 64 divisors (see below), whose sum is σ = 1040129676155520. Its totient is φ = 109486184571648.

The previous prime is 421980218719727. The next prime is 421980218719771. The reversal of 421980218719770 is 77917812089124.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (421980218719771) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 235792749 + ... + 237575631.

It is an arithmetic number, because the mean of its divisors is an integer number (16252026189930).

Almost surely, 2^{421980218719770} is an apocalyptic number.

421980218719770 is an abundant number, since it is smaller than the sum of its proper divisors (618149457435750).

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

421980218719770 is a wasteful number, since it uses less digits than its factorization.

421980218719770 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1996159.

The product of its (nonzero) digits is 28449792, while the sum is 66.

The spelling of 421980218719770 in words is "four hundred twenty-one trillion, nine hundred eighty billion, two hundred eighteen million, seven hundred nineteen thousand, seven hundred seventy".