199815579480 has 64 divisors (see below), whose sum is σ = 653941900800. Its totient is φ = 48440140160.

The previous prime is 199815579451. The next prime is 199815579503. The reversal of 199815579480 is 84975518991.

It is a Harshad number since it is a multiple of its sum of digits (66).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 75686400 + ... + 75689039.

It is an arithmetic number, because the mean of its divisors is an integer number (10217842200).

Almost surely, 2^199815579480 is an apocalyptic number.

199815579480 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

199815579480 is an abundant number, since it is smaller than the sum of its proper divisors (454126321320).

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

199815579480 is a wasteful number, since it uses less digits than its factorization.

199815579480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151375464 (or 151375460 counting only the distinct ones).

The product of its (nonzero) digits is 32659200, while the sum is 66.

The spelling of 199815579480 in words is "one hundred ninety-nine billion, eight hundred fifteen million, five hundred seventy-nine thousand, four hundred eighty".