12400305534 has 12 divisors (see below), whose sum is σ = 26867328696. Its totient is φ = 4133435172.

The previous prime is 12400305503. The next prime is 12400305569. The reversal of 12400305534 is 43550300421.

12400305534 is a `hidden beast` number, since 124 + 0 + 0 + 3 + 0 + 5 + 534 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 12400305498 and 12400305507.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 344452914 + ... + 344452949.

It is an arithmetic number, because the mean of its divisors is an integer number (2238944058).

Almost surely, 2^12400305534 is an apocalyptic number.

12400305534 is an abundant number, since it is smaller than the sum of its proper divisors (14467023162).

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

12400305534 is a wasteful number, since it uses less digits than its factorization.

12400305534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 688905871 (or 688905868 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 27.

Adding to 12400305534 its reverse (43550300421), we get a palindrome (55950605955).

The spelling of 12400305534 in words is "twelve billion, four hundred million, three hundred five thousand, five hundred thirty-four".