16780254403 has 4 divisors (see below), whose sum is σ = 18305732088. Its totient is φ = 15254776720.

The previous prime is 16780254391. The next prime is 16780254431. The reversal of 16780254403 is 30445208761.

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

It is a cyclic number.

It is not a de Polignac number, because 16780254403 - 2⁹ = 16780253891 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16780254103) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 762738826 + ... + 762738847.

It is an arithmetic number, because the mean of its divisors is an integer number (4576433022).

Almost surely, 2^16780254403 is an apocalyptic number.

16780254403 is a deficient number, since it is larger than the sum of its proper divisors (1525477685).

16780254403 is a wasteful number, since it uses less digits than its factorization.

16780254403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1525477684.

The product of its (nonzero) digits is 161280, while the sum is 40.

The spelling of 16780254403 in words is "sixteen billion, seven hundred eighty million, two hundred fifty-four thousand, four hundred three".