202421064456 has 96 divisors (see below), whose sum is σ = 590651694360. Its totient is φ = 62256301056.

The previous prime is 202421064449. The next prime is 202421064479. The reversal of 202421064456 is 654460124202.

202421064456 is a `hidden beast` number, since 2 + 0 + 2 + 4 + 2 + 1 + 0 + 644 + 5 + 6 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 111934408356 + 90486656100 = 334566^2 + 300810^2 .

It is a super-3 number, since 3×202421064456³ (a number of 35 digits) contains 333 as substring.

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

It is a self number, because there is not a number n which added to its sum of digits gives 202421064456.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2160276 + ... + 2252028.

Almost surely, 2^202421064456 is an apocalyptic number.

202421064456 is a gapful number since it is divisible by the number (26) 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 202421064456, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (295325847180).

202421064456 is an abundant number, since it is smaller than the sum of its proper divisors (388230629904).

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

202421064456 is a wasteful number, since it uses less digits than its factorization.

202421064456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94135 (or 94128 counting only the distinct ones).

The product of its (nonzero) digits is 92160, while the sum is 36.

Adding to 202421064456 its reverse (654460124202), we get a palindrome (856881188658).

The spelling of 202421064456 in words is "two hundred two billion, four hundred twenty-one million, sixty-four thousand, four hundred fifty-six".