16040992640 has 64 divisors (see below), whose sum is σ = 38405190960. Its totient is φ = 6406828032.

The previous prime is 16040992637. The next prime is 16040992657. The reversal of 16040992640 is 4629904061.

16040992640 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 congruent number.

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, 418772 + ... + 455468.

Almost surely, 2^16040992640 is an apocalyptic number.

16040992640 is a gapful number since it is divisible by the number (10) 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 16040992640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19202595480).

16040992640 is an abundant number, since it is smaller than the sum of its proper divisors (22364198320).

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

16040992640 is an equidigital number, since it uses as much as digits as its factorization.

16040992640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37399 (or 37387 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 41.

The spelling of 16040992640 in words is "sixteen billion, forty million, nine hundred ninety-two thousand, six hundred forty".