16442040001 has 4 divisors (see below), whose sum is σ = 16488618372. Its totient is φ = 16395461632.

The previous prime is 16442039953. The next prime is 16442040019. The reversal of 16442040001 is 10004024461.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6601400001 + 9840640000 = 81249^2 + 99200^2 .

It is a cyclic number.

It is not a de Polignac number, because 16442040001 - 2³³ = 7852105409 is a prime.

It is a super-3 number, since 3×16442040001³ (a number of 32 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16442040091) 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, 23288656 + ... + 23289361.

It is an arithmetic number, because the mean of its divisors is an integer number (4122154593).

Almost surely, 2^16442040001 is an apocalyptic number.

It is an amenable number.

16442040001 is a deficient number, since it is larger than the sum of its proper divisors (46578371).

16442040001 is an equidigital number, since it uses as much as digits as its factorization.

16442040001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46578370.

The product of its (nonzero) digits is 768, while the sum is 22.

Adding to 16442040001 its reverse (10004024461), we get a palindrome (26446064462).

The spelling of 16442040001 in words is "sixteen billion, four hundred forty-two million, forty thousand, one".