16511677644 has 96 divisors (see below), whose sum is σ = 50122469376. Its totient is φ = 4102274880.

The previous prime is 16511677643. The next prime is 16511677729. The reversal of 16511677644 is 44677611561.

It is a junction number, because it is equal to n+sod(n) for n = 16511677593 and 16511677602.

It is not an unprimeable number, because it can be changed into a prime (16511677643) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 367222 + ... + 409725.

It is an arithmetic number, because the mean of its divisors is an integer number (522109056).

Almost surely, 2^16511677644 is an apocalyptic number.

16511677644 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

16511677644 is an abundant number, since it is smaller than the sum of its proper divisors (33610791732).

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

16511677644 is a wasteful number, since it uses less digits than its factorization.

16511677644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 776995 (or 776993 counting only the distinct ones).

The product of its digits is 846720, while the sum is 48.

The spelling of 16511677644 in words is "sixteen billion, five hundred eleven million, six hundred seventy-seven thousand, six hundred forty-four".