16890439650 has 72 divisors (see below), whose sum is σ = 48727216080. Its totient is φ = 3860670240.

The previous prime is 16890439649. The next prime is 16890439651. The reversal of 16890439650 is 5693409861.

It is an interprime number because it is at equal distance from previous prime (16890439649) and next prime (16890439651).

It is a junction number, because it is equal to n+sod(n) for n = 16890439593 and 16890439602.

It is not an unprimeable number, because it can be changed into a prime (16890439651) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 1141660 + ... + 1156359.

It is an arithmetic number, because the mean of its divisors is an integer number (676766890).

Almost surely, 2^16890439650 is an apocalyptic number.

16890439650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

16890439650 is an abundant number, since it is smaller than the sum of its proper divisors (31836776430).

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

16890439650 is a wasteful number, since it uses less digits than its factorization.

16890439650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2298048 (or 2298036 counting only the distinct ones).

The product of its (nonzero) digits is 1399680, while the sum is 51.

The spelling of 16890439650 in words is "sixteen billion, eight hundred ninety million, four hundred thirty-nine thousand, six hundred fifty".