91000454656 has 20 divisors (see below), whose sum is σ = 181823175072. Its totient is φ = 45500227072.

The previous prime is 91000454653. The next prime is 91000454659. The reversal of 91000454656 is 65645400019.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (91000454653) and next prime (91000454659).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91000454653) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 88867120 + ... + 88868143.

Almost surely, 2^91000454656 is an apocalyptic number.

It is an amenable number.

91000454656 is a deficient number, since it is larger than the sum of its proper divisors (90822720416).

91000454656 is an equidigital number, since it uses as much as digits as its factorization.

91000454656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 177735281 (or 177735265 counting only the distinct ones).

The product of its (nonzero) digits is 129600, while the sum is 40.

The spelling of 91000454656 in words is "ninety-one billion, four hundred fifty-four thousand, six hundred fifty-six".