1041909756921 has 48 divisors (see below), whose sum is σ = 1651463536320. Its totient is φ = 627744768000.

The previous prime is 1041909756911. The next prime is 1041909756941. The reversal of 1041909756921 is 1296579091401.

It is a happy number.

1041909756921 is a `hidden beast` number, since 1 + 0 + 419 + 0 + 97 + 56 + 92 + 1 = 666.

It is not a de Polignac number, because 1041909756921 - 2¹⁵ = 1041909724153 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1041909756911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 79401241 + ... + 79414361.

It is an arithmetic number, because the mean of its divisors is an integer number (34405490340).

Almost surely, 2^{1041909756921} is an apocalyptic number.

1041909756921 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1041909756921 is a deficient number, since it is larger than the sum of its proper divisors (609553779399).

1041909756921 is a wasteful number, since it uses less digits than its factorization.

1041909756921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17798 (or 17795 counting only the distinct ones).

The product of its (nonzero) digits is 1224720, while the sum is 54.

The spelling of 1041909756921 in words is "one trillion, forty-one billion, nine hundred nine million, seven hundred fifty-six thousand, nine hundred twenty-one".