12521762500 has 144 divisors (see below), whose sum is σ = 29710473408. Its totient is φ = 4590000000.

The previous prime is 12521762443. The next prime is 12521762543. The reversal of 12521762500 is 526712521.

It is a super-2 number, since 2×12521762500² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 40787347 + ... + 40787653.

It is an arithmetic number, because the mean of its divisors is an integer number (206322732).

Almost surely, 2^12521762500 is an apocalyptic number.

12521762500 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 12521762500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14855236704).

12521762500 is an abundant number, since it is smaller than the sum of its proper divisors (17188710908).

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

12521762500 is a wasteful number, since it uses less digits than its factorization.

12521762500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 600 (or 578 counting only the distinct ones).

The product of its (nonzero) digits is 8400, while the sum is 31.

The spelling of 12521762500 in words is "twelve billion, five hundred twenty-one million, seven hundred sixty-two thousand, five hundred".