201864816974 has 4 divisors (see below), whose sum is σ = 302797225464. Its totient is φ = 100932408486.

The previous prime is 201864816971. The next prime is 201864816991. The reversal of 201864816974 is 479618468102.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201864816971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50466204242 + ... + 50466204245.

It is an arithmetic number, because the mean of its divisors is an integer number (75699306366).

Almost surely, 2^201864816974 is an apocalyptic number.

201864816974 is a deficient number, since it is larger than the sum of its proper divisors (100932408490).

201864816974 is a wasteful number, since it uses less digits than its factorization.

201864816974 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100932408489.

The product of its (nonzero) digits is 4644864, while the sum is 56.

The spelling of 201864816974 in words is "two hundred one billion, eight hundred sixty-four million, eight hundred sixteen thousand, nine hundred seventy-four".