16442144514457 has 4 divisors (see below), whose sum is σ = 16442210568960. Its totient is φ = 16442078459956.

The previous prime is 16442144514449. The next prime is 16442144514479. The reversal of 16442144514457 is 75441544124461.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 16442144514457 - 2³ = 16442144514449 is a prime.

It is a super-3 number, since 3×16442144514457³ (a number of 41 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16442144914457) 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, 32652457 + ... + 33152182.

It is an arithmetic number, because the mean of its divisors is an integer number (4110552642240).

Almost surely, 2^{16442144514457} is an apocalyptic number.

It is an amenable number.

16442144514457 is a deficient number, since it is larger than the sum of its proper divisors (66054503).

16442144514457 is an equidigital number, since it uses as much as digits as its factorization.

16442144514457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66054502.

The product of its digits is 8601600, while the sum is 52.

The spelling of 16442144514457 in words is "sixteen trillion, four hundred forty-two billion, one hundred forty-four million, five hundred fourteen thousand, four hundred fifty-seven".