16399641550 has 12 divisors (see below), whose sum is σ = 30503333376. Its totient is φ = 6559856600.

The previous prime is 16399641529. The next prime is 16399641553. The reversal of 16399641550 is 5514699361.

It is a junction number, because it is equal to n+sod(n) for n = 16399641494 and 16399641503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16399641553) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 163996366 + ... + 163996465.

It is an arithmetic number, because the mean of its divisors is an integer number (2541944448).

Almost surely, 2^16399641550 is an apocalyptic number.

16399641550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

16399641550 is a deficient number, since it is larger than the sum of its proper divisors (14103691826).

16399641550 is a wasteful number, since it uses less digits than its factorization.

16399641550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 327992843 (or 327992838 counting only the distinct ones).

The product of its (nonzero) digits is 874800, while the sum is 49.

The spelling of 16399641550 in words is "sixteen billion, three hundred ninety-nine million, six hundred forty-one thousand, five hundred fifty".