12546364721 has 8 divisors (see below), whose sum is σ = 13687802688. Its totient is φ = 11405070000.

The previous prime is 12546364687. The next prime is 12546364723. The reversal of 12546364721 is 12746364521.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12546364721 - 2¹⁸ = 12546102577 is a prime.

It is a super-2 number, since 2×12546364721² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12546364723) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 239171 + ... + 286871.

It is an arithmetic number, because the mean of its divisors is an integer number (1710975336).

Almost surely, 2^12546364721 is an apocalyptic number.

12546364721 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12546364721 is a deficient number, since it is larger than the sum of its proper divisors (1141437967).

12546364721 is a wasteful number, since it uses less digits than its factorization.

12546364721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71623.

The product of its digits is 241920, while the sum is 41.

The spelling of 12546364721 in words is "twelve billion, five hundred forty-six million, three hundred sixty-four thousand, seven hundred twenty-one".