91790543126 has 4 divisors (see below), whose sum is σ = 137685814692. Its totient is φ = 45895271562.

The previous prime is 91790543081. The next prime is 91790543129. The reversal of 91790543126 is 62134509719.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 62134509719 = 6121 ⋅10151039.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91790543129) 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 as a sum of consecutive naturals, namely, 22947635780 + ... + 22947635783.

It is an arithmetic number, because the mean of its divisors is an integer number (34421453673).

Almost surely, 2^91790543126 is an apocalyptic number.

91790543126 is a deficient number, since it is larger than the sum of its proper divisors (45895271566).

91790543126 is a wasteful number, since it uses less digits than its factorization.

91790543126 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45895271565.

The product of its (nonzero) digits is 408240, while the sum is 47.

The spelling of 91790543126 in words is "ninety-one billion, seven hundred ninety million, five hundred forty-three thousand, one hundred twenty-six".