12451512416 has 24 divisors (see below), whose sum is σ = 28015903440. Its totient is φ = 5336362368.

The previous prime is 12451512407. The next prime is 12451512427. The reversal of 12451512416 is 61421515421.

It is a happy number.

It is a super-2 number, since 2×12451512416² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27793331 + ... + 27793778.

It is an arithmetic number, because the mean of its divisors is an integer number (1167329310).

Almost surely, 2^12451512416 is an apocalyptic number.

12451512416 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

12451512416 is an abundant number, since it is smaller than the sum of its proper divisors (15564391024).

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

12451512416 is an equidigital number, since it uses as much as digits as its factorization.

12451512416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55587126 (or 55587118 counting only the distinct ones).

The product of its digits is 9600, while the sum is 32.

The spelling of 12451512416 in words is "twelve billion, four hundred fifty-one million, five hundred twelve thousand, four hundred sixteen".