12537752521 has 16 divisors (see below), whose sum is σ = 14367614976. Its totient is φ = 10717627536.

The previous prime is 12537752489. The next prime is 12537752533. The reversal of 12537752521 is 12525773521.

It is not a de Polignac number, because 12537752521 - 2⁵ = 12537752489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12537752581) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5481040 + ... + 5483326.

It is an arithmetic number, because the mean of its divisors is an integer number (897975936).

Almost surely, 2^12537752521 is an apocalyptic number.

It is an amenable number.

12537752521 is a deficient number, since it is larger than the sum of its proper divisors (1829862455).

12537752521 is an equidigital number, since it uses as much as digits as its factorization.

12537752521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4068.

The product of its digits is 147000, while the sum is 40.

The spelling of 12537752521 in words is "twelve billion, five hundred thirty-seven million, seven hundred fifty-two thousand, five hundred twenty-one".