16501942540418 has 8 divisors (see below), whose sum is σ = 24754345245948. Its totient is φ = 8250494125104.

The previous prime is 16501942540411. The next prime is 16501942540429. The reversal of 16501942540418 is 81404524910561.

It can be written as a sum of positive squares in 2 ways, for example, as 16468962890809 + 32979649609 = 4058197^2 + 181603^2 .

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

It is a super-2 number, since 2×16501942540418² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (16501942540411) 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, 238529321 + ... + 238598492.

Almost surely, 2^{16501942540418} is an apocalyptic number.

16501942540418 is a deficient number, since it is larger than the sum of its proper divisors (8252402705530).

16501942540418 is a wasteful number, since it uses less digits than its factorization.

16501942540418 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 477145108.

The product of its (nonzero) digits is 1382400, while the sum is 50.

The spelling of 16501942540418 in words is "sixteen trillion, five hundred one billion, nine hundred forty-two million, five hundred forty thousand, four hundred eighteen".