16273947440 has 40 divisors (see below), whose sum is σ = 37842698448. Its totient is φ = 6508586240.

The previous prime is 16273947433. The next prime is 16273947463. The reversal of 16273947440 is 4474937261.

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

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 742235 + ... + 763845.

Almost surely, 2^16273947440 is an apocalyptic number.

16273947440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16273947440 is an abundant number, since it is smaller than the sum of its proper divisors (21568751008).

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

16273947440 is a wasteful number, since it uses less digits than its factorization.

16273947440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31037 (or 31031 counting only the distinct ones).

The product of its (nonzero) digits is 1016064, while the sum is 47.

The spelling of 16273947440 in words is "sixteen billion, two hundred seventy-three million, nine hundred forty-seven thousand, four hundred forty".