201616431423 has 64 divisors (see below), whose sum is σ = 311885697024. Its totient is φ = 114649920000.

The previous prime is 201616431389. The next prime is 201616431437. The reversal of 201616431423 is 324134616102.

It is a happy number.

It is not a de Polignac number, because 201616431423 - 2⁸ = 201616431167 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201616431473) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 12247348 + ... + 12263798.

It is an arithmetic number, because the mean of its divisors is an integer number (4873214016).

Almost surely, 2^201616431423 is an apocalyptic number.

201616431423 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

201616431423 is a deficient number, since it is larger than the sum of its proper divisors (110269265601).

201616431423 is a wasteful number, since it uses less digits than its factorization.

201616431423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16796.

The product of its (nonzero) digits is 20736, while the sum is 33.

The spelling of 201616431423 in words is "two hundred one billion, six hundred sixteen million, four hundred thirty-one thousand, four hundred twenty-three".