421644805715100 has 144 divisors (see below), whose sum is σ = 1409150469597696. Its totient is φ = 96204162432000.

The previous prime is 421644805715053. The next prime is 421644805715101. The reversal of 421644805715100 is 1517508446124.

It is a self number, because there is not a number n which added to its sum of digits gives 421644805715100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421644805715101) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3757918996 + ... + 3758031195.

It is an arithmetic number, because the mean of its divisors is an integer number (9785767149984).

Almost surely, 2^{421644805715100} is an apocalyptic number.

It is an amenable number.

421644805715100 is an abundant number, since it is smaller than the sum of its proper divisors (987505663882596).

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

421644805715100 is a wasteful number, since it uses less digits than its factorization.

421644805715100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7515950236 (or 7515950229 counting only the distinct ones).

The product of its (nonzero) digits is 1075200, while the sum is 48.

The spelling of 421644805715100 in words is "four hundred twenty-one trillion, six hundred forty-four billion, eight hundred five million, seven hundred fifteen thousand, one hundred".