16631667840 has 64 divisors (see below), whose sum is σ = 53013447360. Its totient is φ = 4435110912.

The previous prime is 16631667799. The next prime is 16631667859. The reversal of 16631667840 is 4876613661.

16631667840 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (64).

It is a super-2 number, since 2×16631667840² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a self number, because there is not a number n which added to its sum of digits gives 16631667840.

It is an unprimeable number.

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, 4329244 + ... + 4333083.

It is an arithmetic number, because the mean of its divisors is an integer number (828335115).

Almost surely, 2^16631667840 is an apocalyptic number.

16631667840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16631667840 is an abundant number, since it is smaller than the sum of its proper divisors (36381779520).

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

16631667840 is an equidigital number, since it uses as much as digits as its factorization.

16631667840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8662349 (or 8662337 counting only the distinct ones).

The product of its (nonzero) digits is 870912, while the sum is 48.

The spelling of 16631667840 in words is "sixteen billion, six hundred thirty-one million, six hundred sixty-seven thousand, eight hundred forty".