12451780944 has 80 divisors (see below), whose sum is σ = 36002279040. Its totient is φ = 4120277760.

The previous prime is 12451780937. The next prime is 12451780993. The reversal of 12451780944 is 44908715421.

12451780944 is a `hidden beast` number, since 12 + 4 + 517 + 80 + 9 + 44 = 666.

It is a super-2 number, since 2×12451780944² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 12451780944.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 46012 + ... + 164379.

It is an arithmetic number, because the mean of its divisors is an integer number (450028488).

Almost surely, 2^12451780944 is an apocalyptic number.

It is an amenable number.

12451780944 is an abundant number, since it is smaller than the sum of its proper divisors (23550498096).

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

12451780944 is a wasteful number, since it uses less digits than its factorization.

12451780944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210545 (or 210533 counting only the distinct ones).

The product of its (nonzero) digits is 322560, while the sum is 45.

The spelling of 12451780944 in words is "twelve billion, four hundred fifty-one million, seven hundred eighty thousand, nine hundred forty-four".