12400051552 has 24 divisors (see below), whose sum is σ = 27900116496. Its totient is φ = 5314307712.

The previous prime is 12400051519. The next prime is 12400051577. The reversal of 12400051552 is 25515000421.

It is a super-2 number, since 2×12400051552² (a number of 21 digits) contains 22 as substring.

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, 27678463 + ... + 27678910.

It is an arithmetic number, because the mean of its divisors is an integer number (1162504854).

Almost surely, 2^12400051552 is an apocalyptic number.

It is an amenable number.

12400051552 is an abundant number, since it is smaller than the sum of its proper divisors (15500064944).

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

12400051552 is an equidigital number, since it uses as much as digits as its factorization.

12400051552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55357390 (or 55357382 counting only the distinct ones).

The product of its (nonzero) digits is 2000, while the sum is 25.

Adding to 12400051552 its reverse (25515000421), we get a palindrome (37915051973).

The spelling of 12400051552 in words is "twelve billion, four hundred million, fifty-one thousand, five hundred fifty-two".