91610097002 has 4 divisors (see below), whose sum is σ = 137415145506. Its totient is φ = 45805048500.

The previous prime is 91610097001. The next prime is 91610097023. The reversal of 91610097002 is 20079001619.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 20079001619 = 122167 ⋅164357.

It can be written as a sum of positive squares in only one way, i.e., 83799249361 + 7810847641 = 289481^2 + 88379^2 .

It is not an unprimeable number, because it can be changed into a prime (91610097001) 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 as a sum of consecutive naturals, namely, 22902524249 + ... + 22902524252.

Almost surely, 2^91610097002 is an apocalyptic number.

91610097002 is a deficient number, since it is larger than the sum of its proper divisors (45805048504).

91610097002 is a wasteful number, since it uses less digits than its factorization.

91610097002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45805048503.

The product of its (nonzero) digits is 6804, while the sum is 35.

The spelling of 91610097002 in words is "ninety-one billion, six hundred ten million, ninety-seven thousand, two".