16451321377 has 4 divisors (see below), whose sum is σ = 16452348976. Its totient is φ = 16450293780.

The previous prime is 16451321371. The next prime is 16451321417. The reversal of 16451321377 is 77312315461.

16451321377 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 a cyclic number.

It is not a de Polignac number, because 16451321377 - 2¹¹ = 16451319329 is a prime.

It is a super-2 number, since 2×16451321377² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16451321371) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 489399 + ... + 521932.

It is an arithmetic number, because the mean of its divisors is an integer number (4113087244).

Almost surely, 2^16451321377 is an apocalyptic number.

It is an amenable number.

16451321377 is a deficient number, since it is larger than the sum of its proper divisors (1027599).

16451321377 is a wasteful number, since it uses less digits than its factorization.

16451321377 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1027598.

The product of its digits is 105840, while the sum is 40.

The spelling of 16451321377 in words is "sixteen billion, four hundred fifty-one million, three hundred twenty-one thousand, three hundred seventy-seven".