16535193963 has 4 divisors (see below), whose sum is σ = 22046925288. Its totient is φ = 11023462640.

The previous prime is 16535193953. The next prime is 16535193967. The reversal of 16535193963 is 36939153561.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 36939153561 = 3 ⋅12313051187.

It is a cyclic number.

It is not a de Polignac number, because 16535193963 - 2²⁸ = 16266758507 is a prime.

It is not an unprimeable number, because it can be changed into a prime (16535193967) 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, 2755865658 + ... + 2755865663.

It is an arithmetic number, because the mean of its divisors is an integer number (5511731322).

Almost surely, 2^16535193963 is an apocalyptic number.

16535193963 is a deficient number, since it is larger than the sum of its proper divisors (5511731325).

16535193963 is an equidigital number, since it uses as much as digits as its factorization.

16535193963 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5511731324.

The product of its digits is 1968300, while the sum is 51.

The spelling of 16535193963 in words is "sixteen billion, five hundred thirty-five million, one hundred ninety-three thousand, nine hundred sixty-three".