91291110002 has 4 divisors (see below), whose sum is σ = 136936665006. Its totient is φ = 45645555000.

The previous prime is 91291109941. The next prime is 91291110007. The reversal of 91291110002 is 20001119219.

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

It can be written as a sum of positive squares in only one way, i.e., 85643437201 + 5647672801 = 292649^2 + 75151^2 .

It is not an unprimeable number, because it can be changed into a prime (91291110007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22822777499 + ... + 22822777502.

Almost surely, 2^91291110002 is an apocalyptic number.

91291110002 is a deficient number, since it is larger than the sum of its proper divisors (45645555004).

91291110002 is a wasteful number, since it uses less digits than its factorization.

91291110002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45645555003.

The product of its (nonzero) digits is 324, while the sum is 26.

The spelling of 91291110002 in words is "ninety-one billion, two hundred ninety-one million, one hundred ten thousand, two".