9142945605721 has 8 divisors (see below), whose sum is σ = 9723371346080. Its totient is φ = 8572441673088.

The previous prime is 9142945605719. The next prime is 9142945605737. The reversal of 9142945605721 is 1275065492419.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 9142945605721 - 2¹ = 9142945605719 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9142945606721) 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, 2480450031 + ... + 2480453716.

It is an arithmetic number, because the mean of its divisors is an integer number (1215421418260).

Almost surely, 2^{9142945605721} is an apocalyptic number.

It is an amenable number.

9142945605721 is a deficient number, since it is larger than the sum of its proper divisors (580425740359).

9142945605721 is a wasteful number, since it uses less digits than its factorization.

9142945605721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4960903863.

The product of its (nonzero) digits is 5443200, while the sum is 55.

The spelling of 9142945605721 in words is "nine trillion, one hundred forty-two billion, nine hundred forty-five million, six hundred five thousand, seven hundred twenty-one".