91706000506 has 8 divisors (see below), whose sum is σ = 145650706740. Its totient is φ = 43155764928.

The previous prime is 91706000497. The next prime is 91706000513. The reversal of 91706000506 is 60500060719.

It can be written as a sum of positive squares in 2 ways, for example, as 83989256481 + 7716744025 = 289809^2 + 87845^2 .

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

It is a Harshad number since it is a multiple of its sum of digits (34), and also a Moran number because the ratio is a prime number: 2697235309 = 91706000506 / (9 + 1 + 7 + 0 + 6 + 0 + 0 + 0 + 5 + 0 + 6).

It is an unprimeable number.

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, 1348617621 + ... + 1348617688.

Almost surely, 2^91706000506 is an apocalyptic number.

91706000506 is the 191527-th centered pentagonal number.

91706000506 is a deficient number, since it is larger than the sum of its proper divisors (53944706234).

91706000506 is a wasteful number, since it uses less digits than its factorization.

91706000506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2697235328.

The product of its (nonzero) digits is 11340, while the sum is 34.

The spelling of 91706000506 in words is "ninety-one billion, seven hundred six million, five hundred six", and thus it is an aban number.