16448687838 has 48 divisors (see below), whose sum is σ = 38908636416. Its totient is φ = 4980615120.

The previous prime is 16448687803. The next prime is 16448687839. The reversal of 16448687838 is 83878684461.

It is a super-2 number, since 2×16448687838² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16448687839) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 231445 + ... + 294047.

It is an arithmetic number, because the mean of its divisors is an integer number (810596592).

Almost surely, 2^16448687838 is an apocalyptic number.

16448687838 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

16448687838 is an abundant number, since it is smaller than the sum of its proper divisors (22459948578).

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

16448687838 is a wasteful number, since it uses less digits than its factorization.

16448687838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63949 (or 63946 counting only the distinct ones).

The product of its digits is 49545216, while the sum is 63.

The spelling of 16448687838 in words is "sixteen billion, four hundred forty-eight million, six hundred eighty-seven thousand, eight hundred thirty-eight".