1521161812544 has 28 divisors (see below), whose sum is σ = 3292969607088. Its totient is φ = 691437187200.

The previous prime is 1521161812501. The next prime is 1521161812549. The reversal of 1521161812544 is 4452181611251.

It is not an unprimeable number, because it can be changed into a prime (1521161812549) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1080369902 + ... + 1080371309.

It is an arithmetic number, because the mean of its divisors is an integer number (117606057396).

Almost surely, 2^{1521161812544} is an apocalyptic number.

It is an amenable number.

1521161812544 is an abundant number, since it is smaller than the sum of its proper divisors (1771807794544).

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

1521161812544 is a wasteful number, since it uses less digits than its factorization.

1521161812544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2160741234 (or 2160741224 counting only the distinct ones).

The product of its digits is 76800, while the sum is 41.

The spelling of 1521161812544 in words is "one trillion, five hundred twenty-one billion, one hundred sixty-one million, eight hundred twelve thousand, five hundred forty-four".