16442736257401 has 4 divisors (see below), whose sum is σ = 16442744704612. Its totient is φ = 16442727810192.

The previous prime is 16442736257309. The next prime is 16442736257413. The reversal of 16442736257401 is 10475263724461.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 5058023490025 + 11384712767376 = 2249005^2 + 3374124^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16442736257401 is a prime.

It is a super-3 number, since 3×16442736257401³ (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 (16442736257201) 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, 339451 + ... + 5744623.

It is an arithmetic number, because the mean of its divisors is an integer number (4110686176153).

Almost surely, 2^{16442736257401} is an apocalyptic number.

It is an amenable number.

16442736257401 is a deficient number, since it is larger than the sum of its proper divisors (8447211).

16442736257401 is an equidigital number, since it uses as much as digits as its factorization.

16442736257401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8447210.

The product of its (nonzero) digits is 6773760, while the sum is 52.

The spelling of 16442736257401 in words is "sixteen trillion, four hundred forty-two billion, seven hundred thirty-six million, two hundred fifty-seven thousand, four hundred one".