199326667680 has 144 divisors (see below), whose sum is σ = 777374043264. Its totient is φ = 45560378880.

The previous prime is 199326667637. The next prime is 199326667699. The reversal of 199326667680 is 86766623991.

It is a tau number, because it is divible by the number of its divisors (144).

It is a super-2 number, since 2×199326667680² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9877156 + ... + 9897315.

It is an arithmetic number, because the mean of its divisors is an integer number (5398430856).

Almost surely, 2^199326667680 is an apocalyptic number.

199326667680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

199326667680 is an abundant number, since it is smaller than the sum of its proper divisors (578047375584).

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

199326667680 is a wasteful number, since it uses less digits than its factorization.

199326667680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19774499 (or 19774488 counting only the distinct ones).

The product of its (nonzero) digits is 35271936, while the sum is 63.

The spelling of 199326667680 in words is "one hundred ninety-nine billion, three hundred twenty-six million, six hundred sixty-seven thousand, six hundred eighty".