16491003394 has 4 divisors (see below), whose sum is σ = 24736505094. Its totient is φ = 8245501696.

The previous prime is 16491003383. The next prime is 16491003433. The reversal of 16491003394 is 49330019461.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 16011612369 + 479391025 = 126537^2 + 21895^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4122750847 + ... + 4122750850.

Almost surely, 2^16491003394 is an apocalyptic number.

16491003394 is a deficient number, since it is larger than the sum of its proper divisors (8245501700).

16491003394 is an equidigital number, since it uses as much as digits as its factorization.

16491003394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8245501699.

The product of its (nonzero) digits is 69984, while the sum is 40.

The spelling of 16491003394 in words is "sixteen billion, four hundred ninety-one million, three thousand, three hundred ninety-four".