199986297480 has 96 divisors (see below), whose sum is σ = 658182844800. Its totient is φ = 52654612608.

The previous prime is 199986297443. The next prime is 199986297487. The reversal of 199986297480 is 84792689991.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a junction number, because it is equal to n+sod(n) for n = 199986297399 and 199986297408.

It is not an unprimeable number, because it can be changed into a prime (199986297487) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3487494 + ... + 3544373.

It is an arithmetic number, because the mean of its divisors is an integer number (6856071300).

Almost surely, 2^199986297480 is an apocalyptic number.

199986297480 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

199986297480 is an abundant number, since it is smaller than the sum of its proper divisors (458196547320).

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

199986297480 is a wasteful number, since it uses less digits than its factorization.

199986297480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7031963 (or 7031956 counting only the distinct ones).

The product of its (nonzero) digits is 141087744, while the sum is 72.

The spelling of 199986297480 in words is "one hundred ninety-nine billion, nine hundred eighty-six million, two hundred ninety-seven thousand, four hundred eighty".