16621577252 has 24 divisors (see below), whose sum is σ = 33537348096. Its totient is φ = 7060491648.

The previous prime is 16621577251. The next prime is 16621577257. The reversal of 16621577252 is 25277512661.

16621577252 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (16621577251) 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 7 ways as a sum of consecutive naturals, for example, 2623508 + ... + 2629835.

It is an arithmetic number, because the mean of its divisors is an integer number (1397389504).

Almost surely, 2^16621577252 is an apocalyptic number.

It is an amenable number.

16621577252 is an abundant number, since it is smaller than the sum of its proper divisors (16915770844).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

16621577252 is a wasteful number, since it uses less digits than its factorization.

16621577252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5253467 (or 5253465 counting only the distinct ones).

The product of its digits is 352800, while the sum is 44.

The spelling of 16621577252 in words is "sixteen billion, six hundred twenty-one million, five hundred seventy-seven thousand, two hundred fifty-two".