16819639652 has 24 divisors (see below), whose sum is σ = 29622717600. Its totient is φ = 8356138560.

The previous prime is 16819639637. The next prime is 16819639657. The reversal of 16819639652 is 25693691861.

It is a super-2 number, since 2×16819639652² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (16819639657) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 504599 + ... + 536897.

It is an arithmetic number, because the mean of its divisors is an integer number (1234279900).

Almost surely, 2^16819639652 is an apocalyptic number.

It is an amenable number.

16819639652 is a deficient number, since it is larger than the sum of its proper divisors (12803077948).

16819639652 is a wasteful number, since it uses less digits than its factorization.

16819639652 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33131 (or 33129 counting only the distinct ones).

The product of its digits is 4199040, while the sum is 56.

The spelling of 16819639652 in words is "sixteen billion, eight hundred nineteen million, six hundred thirty-nine thousand, six hundred fifty-two".