16421107258351 has 4 divisors (see below), whose sum is σ = 16421131046992. Its totient is φ = 16421083469712.

The previous prime is 16421107258337. The next prime is 16421107258393. The reversal of 16421107258351 is 15385270112461.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 16421107258351 - 2¹⁷ = 16421107127279 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16421107258951) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10826955 + ... + 12250108.

It is an arithmetic number, because the mean of its divisors is an integer number (4105282761748).

Almost surely, 2^{16421107258351} is an apocalyptic number.

16421107258351 is a deficient number, since it is larger than the sum of its proper divisors (23788641).

16421107258351 is an equidigital number, since it uses as much as digits as its factorization.

16421107258351 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23788640.

The product of its (nonzero) digits is 403200, while the sum is 46.

The spelling of 16421107258351 in words is "sixteen trillion, four hundred twenty-one billion, one hundred seven million, two hundred fifty-eight thousand, three hundred fifty-one".