91554272909 has 8 divisors (see below), whose sum is σ = 100128973728. Its totient is φ = 83021502960.

The previous prime is 91554272881. The next prime is 91554272959. The reversal of 91554272909 is 90927245519.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 91554272909 - 2⁸ = 91554272653 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 (91554272959) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10478147 + ... + 10486880.

It is an arithmetic number, because the mean of its divisors is an integer number (12516121716).

Almost surely, 2^91554272909 is an apocalyptic number.

It is an amenable number.

91554272909 is a deficient number, since it is larger than the sum of its proper divisors (8574700819).

91554272909 is a wasteful number, since it uses less digits than its factorization.

91554272909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20965435.

The product of its (nonzero) digits is 2041200, while the sum is 53.

It can be divided in two parts, 91554 and 272909, that added together give a palindrome (364463).

The spelling of 91554272909 in words is "ninety-one billion, five hundred fifty-four million, two hundred seventy-two thousand, nine hundred nine".