447716992921 has 16 divisors (see below), whose sum is σ = 514745150400. Its totient is φ = 385128302400.

The previous prime is 447716992909. The next prime is 447716992967. The reversal of 447716992921 is 129299617744.

It is a cyclic number.

It is not a de Polignac number, because 447716992921 - 2¹¹ = 447716990873 is a prime.

It is a super-2 number, since 2×447716992921² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 447716992921.

It is not an unprimeable number, because it can be changed into a prime (447716996921) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1118770 + ... + 1465291.

It is an arithmetic number, because the mean of its divisors is an integer number (32171571900).

Almost surely, 2^447716992921 is an apocalyptic number.

It is an amenable number.

447716992921 is a deficient number, since it is larger than the sum of its proper divisors (67028157479).

447716992921 is a wasteful number, since it uses less digits than its factorization.

447716992921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2584920.

The product of its digits is 13716864, while the sum is 61.

The spelling of 447716992921 in words is "four hundred forty-seven billion, seven hundred sixteen million, nine hundred ninety-two thousand, nine hundred twenty-one".