1999195217041 has 27 divisors (see below), whose sum is σ = 2213216781307. Its totient is φ = 1804512746960.

The previous prime is 1999195217011. The next prime is 1999195217059. The reversal of 1999195217041 is 1407125919991.

The square root of 1999195217041 is 1413929.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 1818573617025 + 180621600016 = 1348545^2 + 424996^2 .

It is not a de Polignac number, because 1999195217041 - 2⁷ = 1999195216913 is a prime.

It is a super-2 number, since 2×1999195217041² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1999195217011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 2690706516 + ... + 2690707258.

Almost surely, 2^{1999195217041} is an apocalyptic number.

1999195217041 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1999195217041 is the 1413929-th square number.

1999195217041 is the 706965-th centered octagonal number.

It is an amenable number.

1999195217041 is a deficient number, since it is larger than the sum of its proper divisors (214021564266).

1999195217041 is an frugal number, since it uses more digits than its factorization.

1999195217041 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1854 (or 927 counting only the distinct ones).

The product of its (nonzero) digits is 1837080, while the sum is 58.

The spelling of 1999195217041 in words is "one trillion, nine hundred ninety-nine billion, one hundred ninety-five million, two hundred seventeen thousand, forty-one".