16447723740 has 72 divisors (see below), whose sum is σ = 57018780000. Its totient is φ = 3759479424.

The previous prime is 16447723727. The next prime is 16447723757. The reversal of 16447723740 is 4732774461.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6525615 + ... + 6528134.

It is an arithmetic number, because the mean of its divisors is an integer number (791927500).

Almost surely, 2^16447723740 is an apocalyptic number.

16447723740 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16447723740 is an abundant number, since it is smaller than the sum of its proper divisors (40571056260).

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

16447723740 is a wasteful number, since it uses less digits than its factorization.

16447723740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13053771 (or 13053766 counting only the distinct ones).

The product of its (nonzero) digits is 790272, while the sum is 45.

The spelling of 16447723740 in words is "sixteen billion, four hundred forty-seven million, seven hundred twenty-three thousand, seven hundred forty".