199987294896 has 80 divisors (see below), whose sum is σ = 574505451520. Its totient is φ = 66608101440.

The previous prime is 199987294883. The next prime is 199987294907. The reversal of 199987294896 is 698492789991.

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, 343761 + ... + 719823.

It is an arithmetic number, because the mean of its divisors is an integer number (7181318144).

Almost surely, 2^199987294896 is an apocalyptic number.

199987294896 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 199987294896, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (287252725760).

199987294896 is an abundant number, since it is smaller than the sum of its proper divisors (374518156624).

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

199987294896 is a wasteful number, since it uses less digits than its factorization.

199987294896 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 377311 (or 377299 counting only the distinct ones).

The product of its digits is 1269789696, while the sum is 81.

The spelling of 199987294896 in words is "one hundred ninety-nine billion, nine hundred eighty-seven million, two hundred ninety-four thousand, eight hundred ninety-six".