91783642622884 has 27 divisors (see below), whose sum is σ = 160807655557731. Its totient is φ = 45838659793920.

The previous prime is 91783642622869. The next prime is 91783642622921. The reversal of 91783642622884 is 48822624638719.

The square root of 91783642622884 is 9580378.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 6542739862884 + 85240902760000 = 2557878^2 + 9232600^2 .

It is a Smith number, since the sum of its digits (70) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 20482845924 + ... + 20482850404.

Almost surely, 2^{91783642622884} is an apocalyptic number.

91783642622884 is the 9580378-th square number.

It is an amenable number.

91783642622884 is a deficient number, since it is larger than the sum of its proper divisors (69024012934847).

91783642622884 is an frugal number, since it uses more digits than its factorization.

91783642622884 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11104 (or 5552 counting only the distinct ones).

The product of its digits is 445906944, while the sum is 70.

The spelling of 91783642622884 in words is "ninety-one trillion, seven hundred eighty-three billion, six hundred forty-two million, six hundred twenty-two thousand, eight hundred eighty-four".