16451503616 has 40 divisors (see below), whose sum is σ = 33110949960. Its totient is φ = 8165675008.

The previous prime is 16451503613. The next prime is 16451503633. The reversal of 16451503616 is 61630515461.

It is a super-2 number, since 2×16451503616² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 16451503616.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16451503613) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 47126 + ... + 187413.

It is an arithmetic number, because the mean of its divisors is an integer number (827773749).

Almost surely, 2^16451503616 is an apocalyptic number.

16451503616 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

16451503616 is an abundant number, since it is smaller than the sum of its proper divisors (16659446344).

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

16451503616 is an equidigital number, since it uses as much as digits as its factorization.

16451503616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 234694 (or 234678 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 38.

The spelling of 16451503616 in words is "sixteen billion, four hundred fifty-one million, five hundred three thousand, six hundred sixteen".