16004477655 has 48 divisors (see below), whose sum is σ = 28161535584. Its totient is φ = 8407203840.

The previous prime is 16004477617. The next prime is 16004477659. The reversal of 16004477655 is 55677440061.

It is not a de Polignac number, because 16004477655 - 2¹¹ = 16004475607 is a prime.

It is a super-2 number, since 2×16004477655² (a number of 21 digits) contains 22 as substring.

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

It is a self number, because there is not a number n which added to its sum of digits gives 16004477655.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16004477659) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 912327 + ... + 929703.

It is an arithmetic number, because the mean of its divisors is an integer number (586698658).

Almost surely, 2^16004477655 is an apocalyptic number.

16004477655 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

16004477655 is a deficient number, since it is larger than the sum of its proper divisors (12157057929).

16004477655 is a wasteful number, since it uses less digits than its factorization.

16004477655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17696 (or 17693 counting only the distinct ones).

The product of its (nonzero) digits is 705600, while the sum is 45.

The spelling of 16004477655 in words is "sixteen billion, four million, four hundred seventy-seven thousand, six hundred fifty-five".