1091845397040 has 80 divisors (see below), whose sum is σ = 3384824759136. Its totient is φ = 291149824000.

The previous prime is 1091845397039. The next prime is 1091845397089. The reversal of 1091845397040 is 407935481901.

It is a tau number, because it is divible by the number of its divisors (80).

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, 12320890 + ... + 12409190.

Almost surely, 2^{1091845397040} is an apocalyptic number.

1091845397040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1091845397040 is an abundant number, since it is smaller than the sum of its proper divisors (2292979362096).

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

1091845397040 is a wasteful number, since it uses less digits than its factorization.

1091845397040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139838 (or 139832 counting only the distinct ones).

The product of its (nonzero) digits is 1088640, while the sum is 51.

The spelling of 1091845397040 in words is "one trillion, ninety-one billion, eight hundred forty-five million, three hundred ninety-seven thousand, forty".