12549450621 has 8 divisors (see below), whose sum is σ = 16829321760. Its totient is φ = 8317939952.

The previous prime is 12549450577. The next prime is 12549450673. The reversal of 12549450621 is 12605494521.

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 12549450621 - 2⁷ = 12549450493 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12549450621.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12549460621) 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, 12089511 + ... + 12090548.

It is an arithmetic number, because the mean of its divisors is an integer number (2103665220).

Almost surely, 2^12549450621 is an apocalyptic number.

It is an amenable number.

12549450621 is a deficient number, since it is larger than the sum of its proper divisors (4279871139).

12549450621 is a wasteful number, since it uses less digits than its factorization.

12549450621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24180235.

The product of its (nonzero) digits is 86400, while the sum is 39.

The spelling of 12549450621 in words is "twelve billion, five hundred forty-nine million, four hundred fifty thousand, six hundred twenty-one".