16451507140405 has 4 divisors (see below), whose sum is σ = 19741808568492. Its totient is φ = 13161205712320.

The previous prime is 16451507140379. The next prime is 16451507140429. The reversal of 16451507140405 is 50404170515461.

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 9610551807921 + 6840955332484 = 3100089^2 + 2615522^2 .

It is not a de Polignac number, because 16451507140405 - 2²⁵ = 16451473585973 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1645150714036 + ... + 1645150714045.

It is an arithmetic number, because the mean of its divisors is an integer number (4935452142123).

Almost surely, 2^{16451507140405} is an apocalyptic number.

It is an amenable number.

16451507140405 is a deficient number, since it is larger than the sum of its proper divisors (3290301428087).

16451507140405 is an equidigital number, since it uses as much as digits as its factorization.

16451507140405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3290301428086.

The product of its (nonzero) digits is 336000, while the sum is 43.

Adding to 16451507140405 its reverse (50404170515461), we get a palindrome (66855677655866).

The spelling of 16451507140405 in words is "sixteen trillion, four hundred fifty-one billion, five hundred seven million, one hundred forty thousand, four hundred five".