421566390000 has 400 divisors, whose sum is σ = 1728099831040. Its totient is φ = 96357600000.

The previous prime is 421566389999. The next prime is 421566390023. The reversal of 421566390000 is 93665124.

It is a happy number.

421566390000 is a `hidden beast` number, since 4 + 2 + 1 + 566 + 3 + 90 + 0 + 0 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (400).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 1778475 + ... + 2001525.

Almost surely, 2^421566390000 is an apocalyptic number.

421566390000 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 421566390000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (864049915520).

421566390000 is an abundant number, since it is smaller than the sum of its proper divisors (1306533441040).

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

421566390000 is a wasteful number, since it uses less digits than its factorization.

421566390000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 223095 (or 223068 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 36.

The spelling of 421566390000 in words is "four hundred twenty-one billion, five hundred sixty-six million, three hundred ninety thousand".