91542871033 has 4 divisors (see below), whose sum is σ = 91543648768. Its totient is φ = 91542093300.

The previous prime is 91542870997. The next prime is 91542871037. The reversal of 91542871033 is 33017824519.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 91542871033 - 2⁹ = 91542870521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91542871037) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 171993 + ... + 461158.

It is an arithmetic number, because the mean of its divisors is an integer number (22885912192).

Almost surely, 2^91542871033 is an apocalyptic number.

It is an amenable number.

91542871033 is a deficient number, since it is larger than the sum of its proper divisors (777735).

91542871033 is a wasteful number, since it uses less digits than its factorization.

91542871033 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 777734.

The product of its (nonzero) digits is 181440, while the sum is 43.

The spelling of 91542871033 in words is "ninety-one billion, five hundred forty-two million, eight hundred seventy-one thousand, thirty-three".