421653028680 has 512 divisors, whose sum is σ = 1538185420800. Its totient is φ = 102120652800.

The previous prime is 421653028663. The next prime is 421653028691. The reversal of 421653028680 is 86820356124.

421653028680 is a `hidden beast` number, since 4 + 2 + 16 + 530 + 28 + 6 + 80 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 260118270 + ... + 260119890.

It is an arithmetic number, because the mean of its divisors is an integer number (3004268400).

Almost surely, 2^421653028680 is an apocalyptic number.

421653028680 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 421653028680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (769092710400).

421653028680 is an abundant number, since it is smaller than the sum of its proper divisors (1116532392120).

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

421653028680 is a wasteful number, since it uses less digits than its factorization.

421653028680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1942 (or 1932 counting only the distinct ones).

The product of its (nonzero) digits is 552960, while the sum is 45.

The spelling of 421653028680 in words is "four hundred twenty-one billion, six hundred fifty-three million, twenty-eight thousand, six hundred eighty".