16265712440 has 32 divisors (see below), whose sum is σ = 36604926000. Its totient is φ = 6505027584.

The previous prime is 16265712377. The next prime is 16265712443. The reversal of 16265712440 is 4421756261.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 16265712394 and 16265712403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16265712443) 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, 186251 + ... + 259269.

Almost surely, 2^16265712440 is an apocalyptic number.

16265712440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16265712440 is an abundant number, since it is smaller than the sum of its proper divisors (20339213560).

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

16265712440 is a wasteful number, since it uses less digits than its factorization.

16265712440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78599 (or 78595 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 38.

The spelling of 16265712440 in words is "sixteen billion, two hundred sixty-five million, seven hundred twelve thousand, four hundred forty".