421905190536 has 192 divisors, whose sum is σ = 1287588556800. Its totient is φ = 128935022400.

The previous prime is 421905190523. The next prime is 421905190543. The reversal of 421905190536 is 635091509124.

421905190536 is a `hidden beast` number, since 4 + 21 + 9 + 0 + 5 + 1 + 90 + 536 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 421905190491 and 421905190500.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 960781 + ... + 1329251.

It is an arithmetic number, because the mean of its divisors is an integer number (6706190400).

Almost surely, 2^421905190536 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 421905190536, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (643794278400).

421905190536 is an abundant number, since it is smaller than the sum of its proper divisors (865683366264).

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

421905190536 is a wasteful number, since it uses less digits than its factorization.

421905190536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 368542 (or 368526 counting only the distinct ones).

The product of its (nonzero) digits is 291600, while the sum is 45.

The spelling of 421905190536 in words is "four hundred twenty-one billion, nine hundred five million, one hundred ninety thousand, five hundred thirty-six".