91344440141 has 4 divisors (see below), whose sum is σ = 91519765884. Its totient is φ = 91169114400.

The previous prime is 91344440129. The next prime is 91344440189. The reversal of 91344440141 is 14104444319.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 36079482916 + 55264957225 = 189946^2 + 235085^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-91344440141 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 (91344440111) 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 in 3 ways as a sum of consecutive naturals, for example, 87662090 + ... + 87663131.

It is an arithmetic number, because the mean of its divisors is an integer number (22879941471).

Almost surely, 2^91344440141 is an apocalyptic number.

It is an amenable number.

91344440141 is a deficient number, since it is larger than the sum of its proper divisors (175325743).

91344440141 is a wasteful number, since it uses less digits than its factorization.

91344440141 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 175325742.

The product of its (nonzero) digits is 27648, while the sum is 35.

The spelling of 91344440141 in words is "ninety-one billion, three hundred forty-four million, four hundred forty thousand, one hundred forty-one".