16440479552 has 56 divisors (see below), whose sum is σ = 38570367360. Its totient is φ = 6802951680.

The previous prime is 16440479537. The next prime is 16440479563. The reversal of 16440479552 is 25597404461.

It is a tau number, because it is divible by the number of its divisors (56).

It is a super-3 number, since 3×16440479552³ (a number of 32 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 16440479497 and 16440479506.

It is a congruent number.

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, 619724 + ... + 645707.

It is an arithmetic number, because the mean of its divisors is an integer number (688756560).

Almost surely, 2^16440479552 is an apocalyptic number.

It is an amenable number.

16440479552 is an abundant number, since it is smaller than the sum of its proper divisors (22129887808).

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

16440479552 is a wasteful number, since it uses less digits than its factorization.

16440479552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1265479 (or 1265469 counting only the distinct ones).

The product of its (nonzero) digits is 1209600, while the sum is 47.

The spelling of 16440479552 in words is "sixteen billion, four hundred forty million, four hundred seventy-nine thousand, five hundred fifty-two".