1091557158433 has 8 divisors (see below), whose sum is σ = 1268637860160. Its totient is φ = 919762447920.

The previous prime is 1091557158331. The next prime is 1091557158437. The reversal of 1091557158433 is 3348517551901.

1091557158433 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1091557158433 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1091557158437) 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, 1321497358 + ... + 1321498183.

It is an arithmetic number, because the mean of its divisors is an integer number (158579732520).

Almost surely, 2^{1091557158433} is an apocalyptic number.

It is an amenable number.

1091557158433 is a deficient number, since it is larger than the sum of its proper divisors (177080701727).

1091557158433 is an equidigital number, since it uses as much as digits as its factorization.

1091557158433 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2642995607.

The product of its (nonzero) digits is 2268000, while the sum is 52.

The spelling of 1091557158433 in words is "one trillion, ninety-one billion, five hundred fifty-seven million, one hundred fifty-eight thousand, four hundred thirty-three".