1091938365573 has 24 divisors (see below), whose sum is σ = 1600791166464. Its totient is φ = 661580346240.

The previous prime is 1091938365493. The next prime is 1091938365587. The reversal of 1091938365573 is 3755638391901.

1091938365573 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1091938365573 - 2⁸ = 1091938365317 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1091938361573) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 748636 + ... + 1656602.

It is an arithmetic number, because the mean of its divisors is an integer number (66699631936).

Almost surely, 2^{1091938365573} is an apocalyptic number.

It is an amenable number.

1091938365573 is a deficient number, since it is larger than the sum of its proper divisors (508852800891).

1091938365573 is a wasteful number, since it uses less digits than its factorization.

1091938365573 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 911305 (or 911294 counting only the distinct ones).

The product of its (nonzero) digits is 18370800, while the sum is 60.

The spelling of 1091938365573 in words is "one trillion, ninety-one billion, nine hundred thirty-eight million, three hundred sixty-five thousand, five hundred seventy-three".