91382440357 has 32 divisors (see below), whose sum is σ = 102564000000. Its totient is φ = 80839503360.

The previous prime is 91382440343. The next prime is 91382440361. The reversal of 91382440357 is 75304428319.

It is a cyclic number.

It is not a de Polignac number, because 91382440357 - 2¹⁹ = 91381916069 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 (91382440397) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 37435257 + ... + 37437697.

It is an arithmetic number, because the mean of its divisors is an integer number (3205125000).

Almost surely, 2^91382440357 is an apocalyptic number.

It is an amenable number.

91382440357 is a deficient number, since it is larger than the sum of its proper divisors (11181559643).

91382440357 is a wasteful number, since it uses less digits than its factorization.

91382440357 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3181.

The product of its (nonzero) digits is 725760, while the sum is 46.

The spelling of 91382440357 in words is "ninety-one billion, three hundred eighty-two million, four hundred forty thousand, three hundred fifty-seven".