16521314604 has 24 divisors (see below), whose sum is σ = 39369942528. Its totient is φ = 5389932240.

The previous prime is 16521314597. The next prime is 16521314611. The reversal of 16521314604 is 40641312561.

It is an interprime number because it is at equal distance from previous prime (16521314597) and next prime (16521314611).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14645992 + ... + 14647119.

It is an arithmetic number, because the mean of its divisors is an integer number (1640414272).

Almost surely, 2^16521314604 is an apocalyptic number.

It is an amenable number.

16521314604 is an abundant number, since it is smaller than the sum of its proper divisors (22848627924).

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

16521314604 is a wasteful number, since it uses less digits than its factorization.

16521314604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29293165 (or 29293163 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 33.

The spelling of 16521314604 in words is "sixteen billion, five hundred twenty-one million, three hundred fourteen thousand, six hundred four".