16123963453 has 4 divisors (see below), whose sum is σ = 17364268348. Its totient is φ = 14883658560.

The previous prime is 16123963433. The next prime is 16123963469. The reversal of 16123963453 is 35436932161.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 35436932161 = 461 ⋅76869701.

It can be written as a sum of positive squares in 2 ways, for example, as 2754360324 + 13369603129 = 52482^2 + 115627^2 .

It is a cyclic number.

It is not a de Polignac number, because 16123963453 - 2⁵ = 16123963421 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16123963433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 620152428 + ... + 620152453.

It is an arithmetic number, because the mean of its divisors is an integer number (4341067087).

Almost surely, 2^16123963453 is an apocalyptic number.

16123963453 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

16123963453 is a deficient number, since it is larger than the sum of its proper divisors (1240304895).

16123963453 is a wasteful number, since it uses less digits than its factorization.

16123963453 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1240304894.

The product of its digits is 349920, while the sum is 43.

The spelling of 16123963453 in words is "sixteen billion, one hundred twenty-three million, nine hundred sixty-three thousand, four hundred fifty-three".