16642547712 has 280 divisors, whose sum is σ = 56837738496. Its totient is φ = 4753686528.

The previous prime is 16642547693. The next prime is 16642547731. The reversal of 16642547712 is 21774524661.

16642547712 is a `hidden beast` number, since 1 + 66 + 42 + 547 + 7 + 1 + 2 = 666.

It is an interprime number because it is at equal distance from previous prime (16642547693) and next prime (16642547731).

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 4643073 + ... + 4646655.

Almost surely, 2^16642547712 is an apocalyptic number.

16642547712 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16642547712, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28418869248).

16642547712 is an abundant number, since it is smaller than the sum of its proper divisors (40195190784).

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

16642547712 is an frugal number, since it uses more digits than its factorization.

16642547712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3628 (or 3595 counting only the distinct ones).

The product of its digits is 564480, while the sum is 45.

The spelling of 16642547712 in words is "sixteen billion, six hundred forty-two million, five hundred forty-seven thousand, seven hundred twelve".