991994601941 has 8 divisors (see below), whose sum is σ = 1133716161024. Its totient is φ = 850275054000.

The previous prime is 991994601901. The next prime is 991994601967. The reversal of 991994601941 is 149106499199.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 991994601941 - 2¹⁰ = 991994600917 is a prime.

It is a super-3 number, since 3×991994601941³ (a number of 37 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (991994601901) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 768476 + ... + 1604538.

It is an arithmetic number, because the mean of its divisors is an integer number (141714520128).

Almost surely, 2^991994601941 is an apocalyptic number.

It is an amenable number.

991994601941 is a deficient number, since it is larger than the sum of its proper divisors (141721559083).

991994601941 is a wasteful number, since it uses less digits than its factorization.

991994601941 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1005571.

The product of its (nonzero) digits is 5668704, while the sum is 62.

The spelling of 991994601941 in words is "nine hundred ninety-one billion, nine hundred ninety-four million, six hundred one thousand, nine hundred forty-one".