16442663777461 has 4 divisors (see below), whose sum is σ = 17157562202592. Its totient is φ = 15727765352332.

The previous prime is 16442663777399. The next prime is 16442663777489. The reversal of 16442663777461 is 16477736624461.

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 not a de Polignac number, because 16442663777461 - 2¹⁵ = 16442663744693 is a prime.

It is a super-3 number, since 3×16442663777461³ (a number of 41 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 16442663777393 and 16442663777402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16442663774461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 357449212531 + ... + 357449212576.

It is an arithmetic number, because the mean of its divisors is an integer number (4289390550648).

Almost surely, 2^{16442663777461} is an apocalyptic number.

It is an amenable number.

16442663777461 is a deficient number, since it is larger than the sum of its proper divisors (714898425131).

16442663777461 is an equidigital number, since it uses as much as digits as its factorization.

16442663777461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 714898425130.

The product of its digits is 170698752, while the sum is 64.

The spelling of 16442663777461 in words is "sixteen trillion, four hundred forty-two billion, six hundred sixty-three million, seven hundred seventy-seven thousand, four hundred sixty-one".