91551882597533 has 4 divisors (see below), whose sum is σ = 93103609421280. Its totient is φ = 90000155773788.

The previous prime is 91551882597523. The next prime is 91551882597541. The reversal of 91551882597533 is 33579528815519.

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.

It is a cyclic number.

It is not a de Polignac number, because 91551882597533 - 2⁸ = 91551882597277 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91551882597523) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 775863411785 + ... + 775863411902.

It is an arithmetic number, because the mean of its divisors is an integer number (23275902355320).

Almost surely, 2^{91551882597533} is an apocalyptic number.

It is an amenable number.

91551882597533 is a deficient number, since it is larger than the sum of its proper divisors (1551726823747).

91551882597533 is a wasteful number, since it uses less digits than its factorization.

91551882597533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1551726823746.

The product of its digits is 408240000, while the sum is 71.

The spelling of 91551882597533 in words is "ninety-one trillion, five hundred fifty-one billion, eight hundred eighty-two million, five hundred ninety-seven thousand, five hundred thirty-three".