199720764480 has 56 divisors (see below), whose sum is σ = 634113430272. Its totient is φ = 53258870272.

The previous prime is 199720764461. The next prime is 199720764521. The reversal of 199720764480 is 84467027991.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 199720764480.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 104020272 + ... + 104022191.

It is an arithmetic number, because the mean of its divisors is an integer number (11323454112).

Almost surely, 2^199720764480 is an apocalyptic number.

199720764480 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

199720764480 is an abundant number, since it is smaller than the sum of its proper divisors (434392665792).

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

199720764480 is a wasteful number, since it uses less digits than its factorization.

199720764480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 208042483 (or 208042473 counting only the distinct ones).

The product of its (nonzero) digits is 6096384, while the sum is 57.

The spelling of 199720764480 in words is "one hundred ninety-nine billion, seven hundred twenty million, seven hundred sixty-four thousand, four hundred eighty".