9142449894521 has 4 divisors (see below), whose sum is σ = 9147701159844. Its totient is φ = 9137198629200.

The previous prime is 9142449894517. The next prime is 9142449894527. The reversal of 9142449894521 is 1254989442419.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1188893652496 + 7953556242025 = 1090364^2 + 2820205^2 .

It is a cyclic number.

It is not a de Polignac number, because 9142449894521 - 2² = 9142449894517 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9142449894527) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2625630050 + ... + 2625633531.

It is an arithmetic number, because the mean of its divisors is an integer number (2286925289961).

Almost surely, 2^{9142449894521} is an apocalyptic number.

It is an amenable number.

9142449894521 is a deficient number, since it is larger than the sum of its proper divisors (5251265323).

9142449894521 is a wasteful number, since it uses less digits than its factorization.

9142449894521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5251265322.

The product of its digits is 29859840, while the sum is 62.

The spelling of 9142449894521 in words is "nine trillion, one hundred forty-two billion, four hundred forty-nine million, eight hundred ninety-four thousand, five hundred twenty-one".