16720447220457 has 8 divisors (see below), whose sum is σ = 23062685821440. Its totient is φ = 10762586716560.

The previous prime is 16720447220453. The next prime is 16720447220483. The reversal of 16720447220457 is 75402274402761.

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

It is not a de Polignac number, because 16720447220457 - 2² = 16720447220453 is a prime.

It is not an unprimeable number, because it can be changed into a prime (16720447220453) 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, 96094524169 + ... + 96094524342.

It is an arithmetic number, because the mean of its divisors is an integer number (2882835727680).

Almost surely, 2^{16720447220457} is an apocalyptic number.

It is an amenable number.

16720447220457 is a deficient number, since it is larger than the sum of its proper divisors (6342238600983).

16720447220457 is a wasteful number, since it uses less digits than its factorization.

16720447220457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 192189048543.

The product of its (nonzero) digits is 5268480, while the sum is 51.

The spelling of 16720447220457 in words is "sixteen trillion, seven hundred twenty billion, four hundred forty-seven million, two hundred twenty thousand, four hundred fifty-seven".