6442520502 has 64 divisors (see below), whose sum is σ = 14544230400. Its totient is φ = 1884825600.

The previous prime is 6442520473. The next prime is 6442520509. The reversal of 6442520502 is 2050252446.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 6442520502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6442520509) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 915148 + ... + 922160.

It is an arithmetic number, because the mean of its divisors is an integer number (227253600).

Almost surely, 2^6442520502 is an apocalyptic number.

6442520502 is a gapful number since it is divisible by the number (62) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 6442520502, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7272115200).

6442520502 is an abundant number, since it is smaller than the sum of its proper divisors (8101709898).

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

6442520502 is a wasteful number, since it uses less digits than its factorization.

6442520502 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7509.

The product of its (nonzero) digits is 19200, while the sum is 30.

The square root of 6442520502 is about 80265.3131931845. The cubic root of 6442520502 is about 1860.7381836986.

Adding to 6442520502 its reverse (2050252446), we get a palindrome (8492772948).

The spelling of 6442520502 in words is "six billion, four hundred forty-two million, five hundred twenty thousand, five hundred two".