16527645421 has 8 divisors (see below), whose sum is σ = 19328010944. Its totient is φ = 13837098240.

The previous prime is 16527645413. The next prime is 16527645467. The reversal of 16527645421 is 12454672561.

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

It is not a de Polignac number, because 16527645421 - 2³ = 16527645413 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16527645401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27454260 + ... + 27454861.

It is an arithmetic number, because the mean of its divisors is an integer number (2416001368).

Almost surely, 2^16527645421 is an apocalyptic number.

It is an amenable number.

16527645421 is a deficient number, since it is larger than the sum of its proper divisors (2800365523).

16527645421 is an equidigital number, since it uses as much as digits as its factorization.

16527645421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54909171.

The product of its digits is 403200, while the sum is 43.

The spelling of 16527645421 in words is "sixteen billion, five hundred twenty-seven million, six hundred forty-five thousand, four hundred twenty-one".