126501330320 has 80 divisors (see below), whose sum is σ = 307520496000. Its totient is φ = 48303163392.

The previous prime is 126501330317. The next prime is 126501330379. The reversal of 126501330320 is 23033105621.

It is a tau number, because it is divible by the number of its divisors (80).

It is a self number, because there is not a number n which added to its sum of digits gives 126501330320.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 849272 + ... + 987048.

It is an arithmetic number, because the mean of its divisors is an integer number (3844006200).

Almost surely, 2^126501330320 is an apocalyptic number.

126501330320 is a gapful number since it is divisible by the number (10) 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 126501330320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (153760248000).

126501330320 is an abundant number, since it is smaller than the sum of its proper divisors (181019165680).

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

126501330320 is a wasteful number, since it uses less digits than its factorization.

126501330320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138312 (or 138306 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 26.

Adding to 126501330320 its reverse (23033105621), we get a palindrome (149534435941).

The spelling of 126501330320 in words is "one hundred twenty-six billion, five hundred one million, three hundred thirty thousand, three hundred twenty".