1243561251436 has 12 divisors (see below), whose sum is σ = 2487122502928. Its totient is φ = 532954822032.

The previous prime is 1243561251371. The next prime is 1243561251469. The reversal of 1243561251436 is 6341521653421.

1243561251436 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 1243561251392 and 1243561251401.

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, 22206450891 + ... + 22206450946.

Almost surely, 2^{1243561251436} is an apocalyptic number.

It is an amenable number.

1243561251436 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1243561251436 is a wasteful number, since it uses less digits than its factorization.

1243561251436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44412901848 (or 44412901846 counting only the distinct ones).

The product of its digits is 518400, while the sum is 43.

The spelling of 1243561251436 in words is "one trillion, two hundred forty-three billion, five hundred sixty-one million, two hundred fifty-one thousand, four hundred thirty-six".