16143321975 has 192 divisors, whose sum is σ = 33587136000. Its totient is φ = 6735052800.

The previous prime is 16143321959. The next prime is 16143321991. The reversal of 16143321975 is 57912334161.

It is an interprime number because it is at equal distance from previous prime (16143321959) and next prime (16143321991).

It is not a de Polignac number, because 16143321975 - 2⁴ = 16143321959 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 7726731 + ... + 7728819.

It is an arithmetic number, because the mean of its divisors is an integer number (174933000).

Almost surely, 2^16143321975 is an apocalyptic number.

16143321975 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

16143321975 is an abundant number, since it is smaller than the sum of its proper divisors (17443814025).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

16143321975 is a wasteful number, since it uses less digits than its factorization.

16143321975 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2178 (or 2173 counting only the distinct ones).

The product of its digits is 136080, while the sum is 42.

The spelling of 16143321975 in words is "sixteen billion, one hundred forty-three million, three hundred twenty-one thousand, nine hundred seventy-five".