16043256440 has 16 divisors (see below), whose sum is σ = 36097327080. Its totient is φ = 6417302560.

The previous prime is 16043256389. The next prime is 16043256457. The reversal of 16043256440 is 4465234061.

It is a self number, because there is not a number n which added to its sum of digits gives 16043256440.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 200540666 + ... + 200540745.

Almost surely, 2^16043256440 is an apocalyptic number.

16043256440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16043256440 is an abundant number, since it is smaller than the sum of its proper divisors (20054070640).

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

16043256440 is a wasteful number, since it uses less digits than its factorization.

16043256440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 401081422 (or 401081418 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 35.

The spelling of 16043256440 in words is "sixteen billion, forty-three million, two hundred fifty-six thousand, four hundred forty".