16387621208 has 32 divisors (see below), whose sum is σ = 35692016160. Its totient is φ = 6908129280.

The previous prime is 16387621207. The next prime is 16387621219. The reversal of 16387621208 is 80212678361.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16387621207) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2395241 + ... + 2402072.

It is an arithmetic number, because the mean of its divisors is an integer number (1115375505).

Almost surely, 2^16387621208 is an apocalyptic number.

It is an amenable number.

16387621208 is an abundant number, since it is smaller than the sum of its proper divisors (19304394952).

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

16387621208 is a wasteful number, since it uses less digits than its factorization.

16387621208 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4797387 (or 4797383 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 44.

The spelling of 16387621208 in words is "sixteen billion, three hundred eighty-seven million, six hundred twenty-one thousand, two hundred eight".