16634243440 has 40 divisors (see below), whose sum is σ = 38682733968. Its totient is φ = 6652300800.

The previous prime is 16634243413. The next prime is 16634243441. The reversal of 16634243440 is 4434243661.

It is a tau number, because it is divible by the number of its divisors (40).

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 16634243440.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16634243441) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 416340 + ... + 454540.

Almost surely, 2^16634243440 is an apocalyptic number.

16634243440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16634243440 is an abundant number, since it is smaller than the sum of its proper divisors (22048490528).

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

16634243440 is a wasteful number, since it uses less digits than its factorization.

16634243440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43657 (or 43651 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 37.

The spelling of 16634243440 in words is "sixteen billion, six hundred thirty-four million, two hundred forty-three thousand, four hundred forty".