1331994815448 has 32 divisors (see below), whose sum is σ = 3632713133760. Its totient is φ = 403634792480.

The previous prime is 1331994815447. The next prime is 1331994815461. The reversal of 1331994815448 is 8445184991331.

It is a junction number, because it is equal to n+sod(n) for n = 1331994815391 and 1331994815400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1331994815443) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2522717190 + ... + 2522717717.

It is an arithmetic number, because the mean of its divisors is an integer number (113522285430).

Almost surely, 2^{1331994815448} is an apocalyptic number.

It is an amenable number.

1331994815448 is an abundant number, since it is smaller than the sum of its proper divisors (2300718318312).

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

1331994815448 is a wasteful number, since it uses less digits than its factorization.

1331994815448 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5045434927 (or 5045434923 counting only the distinct ones).

The product of its digits is 14929920, while the sum is 60.

The spelling of 1331994815448 in words is "one trillion, three hundred thirty-one billion, nine hundred ninety-four million, eight hundred fifteen thousand, four hundred forty-eight".