91447343611 has 4 divisors (see below), whose sum is σ = 98481754672. Its totient is φ = 84412932552.

The previous prime is 91447343563. The next prime is 91447343623. The reversal of 91447343611 is 11634374419.

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

It is not a de Polignac number, because 91447343611 - 2¹⁹ = 91446819323 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91447343681) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3517205511 + ... + 3517205536.

It is an arithmetic number, because the mean of its divisors is an integer number (24620438668).

Almost surely, 2^91447343611 is an apocalyptic number.

91447343611 is a deficient number, since it is larger than the sum of its proper divisors (7034411061).

91447343611 is a wasteful number, since it uses less digits than its factorization.

91447343611 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7034411060.

The product of its digits is 217728, while the sum is 43.

The spelling of 91447343611 in words is "ninety-one billion, four hundred forty-seven million, three hundred forty-three thousand, six hundred eleven".