91005000446 has 4 divisors (see below), whose sum is σ = 136507500672. Its totient is φ = 45502500222.

The previous prime is 91005000439. The next prime is 91005000469. The reversal of 91005000446 is 64400050019.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 64400050019 = 40693 ⋅1582583.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22751250110 + ... + 22751250113.

It is an arithmetic number, because the mean of its divisors is an integer number (34126875168).

Almost surely, 2^91005000446 is an apocalyptic number.

91005000446 is a deficient number, since it is larger than the sum of its proper divisors (45502500226).

91005000446 is a wasteful number, since it uses less digits than its factorization.

91005000446 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45502500225.

The product of its (nonzero) digits is 4320, while the sum is 29.

The spelling of 91005000446 in words is "ninety-one billion, five million, four hundred forty-six", and thus it is an aban number.