6445242232 has 256 divisors, whose sum is σ = 15823382400. Its totient is φ = 2429706240.

The previous prime is 6445242217. The next prime is 6445242233. The reversal of 6445242232 is 2322425446.

It is a super-2 number, since 2×6445242232² = 83082294858312683648, which contains 22 as substring.

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6445242233) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 121608318 + ... + 121608370.

Almost surely, 2^6445242232 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 6445242232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7911691200).

6445242232 is an abundant number, since it is smaller than the sum of its proper divisors (9378140168).

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

6445242232 is a wasteful number, since it uses less digits than its factorization.

6445242232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163 (or 133 counting only the distinct ones).

The product of its digits is 92160, while the sum is 34.

The square root of 6445242232 is about 80282.2659869538. The cubic root of 6445242232 is about 1861.0001781527. Note that the first 3 decimals are identical.

Adding to 6445242232 its reverse (2322425446), we get a palindrome (8767667678).

The spelling of 6445242232 in words is "six billion, four hundred forty-five million, two hundred forty-two thousand, two hundred thirty-two".