12531540045394 has 4 divisors (see below), whose sum is σ = 18797310068094. Its totient is φ = 6265770022696.

The previous prime is 12531540045359. The next prime is 12531540045467. The reversal of 12531540045394 is 49354004513521.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 11194290649369 + 1337249396025 = 3345787^2 + 1156395^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3132885011347 + ... + 3132885011350.

Almost surely, 2^{12531540045394} is an apocalyptic number.

12531540045394 is a deficient number, since it is larger than the sum of its proper divisors (6265770022700).

12531540045394 is an equidigital number, since it uses as much as digits as its factorization.

12531540045394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6265770022699.

The product of its (nonzero) digits is 1296000, while the sum is 46.

The spelling of 12531540045394 in words is "twelve trillion, five hundred thirty-one billion, five hundred forty million, forty-five thousand, three hundred ninety-four".