199681769490 has 32 divisors (see below), whose sum is σ = 547698568320. Its totient is φ = 45641547264.

The previous prime is 199681769479. The next prime is 199681769533. The reversal of 199681769490 is 94967186991.

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, 475432575 + ... + 475432994.

It is an arithmetic number, because the mean of its divisors is an integer number (17115580260).

Almost surely, 2^199681769490 is an apocalyptic number.

199681769490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

199681769490 is an abundant number, since it is smaller than the sum of its proper divisors (348016798830).

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

199681769490 is a wasteful number, since it uses less digits than its factorization.

199681769490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 950865586.

The product of its (nonzero) digits is 52907904, while the sum is 69.

The spelling of 199681769490 in words is "one hundred ninety-nine billion, six hundred eighty-one million, seven hundred sixty-nine thousand, four hundred ninety".