12421453646 has 24 divisors (see below), whose sum is σ = 22616528400. Its totient is φ = 5092023552.

The previous prime is 12421453619. The next prime is 12421453663. The reversal of 12421453646 is 64635412421.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2753171 + ... + 2757678.

It is an arithmetic number, because the mean of its divisors is an integer number (942355350).

Almost surely, 2^12421453646 is an apocalyptic number.

12421453646 is a deficient number, since it is larger than the sum of its proper divisors (10195074754).

12421453646 is a wasteful number, since it uses less digits than its factorization.

12421453646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5510888 (or 5510881 counting only the distinct ones).

The product of its digits is 138240, while the sum is 38.

The spelling of 12421453646 in words is "twelve billion, four hundred twenty-one million, four hundred fifty-three thousand, six hundred forty-six".