12455461640 has 16 divisors (see below), whose sum is σ = 28024788780. Its totient is φ = 4982184640.

The previous prime is 12455461597. The next prime is 12455461679. The reversal of 12455461640 is 4616455421.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 12315228676 + 140232964 = 110974^2 + 11842^2 .

It is a super-2 number, since 2×12455461640² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12455461594 and 12455461603.

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, 155693231 + ... + 155693310.

Almost surely, 2^12455461640 is an apocalyptic number.

12455461640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12455461640 is an abundant number, since it is smaller than the sum of its proper divisors (15569327140).

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

12455461640 is a wasteful number, since it uses less digits than its factorization.

12455461640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 311386552 (or 311386548 counting only the distinct ones).

The product of its (nonzero) digits is 115200, while the sum is 38.

The spelling of 12455461640 in words is "twelve billion, four hundred fifty-five million, four hundred sixty-one thousand, six hundred forty".