91026012000 has 1536 divisors, whose sum is σ = 398529331200. Its totient is φ = 17611776000.

The previous prime is 91026011963. The next prime is 91026012037. The reversal of 91026012000 is 21062019.

It is an interprime number because it is at equal distance from previous prime (91026011963) and next prime (91026012037).

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is an unprimeable number.

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 255 ways as a sum of consecutive naturals, for example, 1152227961 + ... + 1152228039.

It is an arithmetic number, because the mean of its divisors is an integer number (259459200).

Almost surely, 2^91026012000 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 91026012000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (199264665600).

91026012000 is an abundant number, since it is smaller than the sum of its proper divisors (307503319200).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

91026012000 is a wasteful number, since it uses less digits than its factorization.

91026012000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 197 (or 179 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 21.

Adding to 91026012000 its reverse (21062019), we get a palindrome (91047074019).

The spelling of 91026012000 in words is "ninety-one billion, twenty-six million, twelve thousand".