16461340503 has 4 divisors (see below), whose sum is σ = 21948454008. Its totient is φ = 10974227000.

The previous prime is 16461340471. The next prime is 16461340529. The reversal of 16461340503 is 30504316461.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 30504316461 = 3 ⋅10168105487.

It is a cyclic number.

It is not a de Polignac number, because 16461340503 - 2⁵ = 16461340471 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16461342503) 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, 2743556748 + ... + 2743556753.

It is an arithmetic number, because the mean of its divisors is an integer number (5487113502).

Almost surely, 2^16461340503 is an apocalyptic number.

16461340503 is a deficient number, since it is larger than the sum of its proper divisors (5487113505).

16461340503 is an equidigital number, since it uses as much as digits as its factorization.

16461340503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5487113504.

The product of its (nonzero) digits is 25920, while the sum is 33.

Adding to 16461340503 its reverse (30504316461), we get a palindrome (46965656964).

The spelling of 16461340503 in words is "sixteen billion, four hundred sixty-one million, three hundred forty thousand, five hundred three".