1991041536760 has 32 divisors (see below), whose sum is σ = 4484604268800. Its totient is φ = 795570248320.

The previous prime is 1991041536721. The next prime is 1991041536761. The reversal of 1991041536760 is 676351401991.

It is a super-2 number, since 2×1991041536760² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1991041536698 and 1991041536707.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1991041536761) 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 7 ways as a sum of consecutive naturals, for example, 26410840 + ... + 26486119.

It is an arithmetic number, because the mean of its divisors is an integer number (140143883400).

Almost surely, 2^{1991041536760} is an apocalyptic number.

1991041536760 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1991041536760 is an abundant number, since it is smaller than the sum of its proper divisors (2493562732040).

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

1991041536760 is a wasteful number, since it uses less digits than its factorization.

1991041536760 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52897911 (or 52897907 counting only the distinct ones).

The product of its (nonzero) digits is 1224720, while the sum is 52.

The spelling of 1991041536760 in words is "one trillion, nine hundred ninety-one billion, forty-one million, five hundred thirty-six thousand, seven hundred sixty".