91603353601 has 4 divisors (see below), whose sum is σ = 91842527232. Its totient is φ = 91364179972.

The previous prime is 91603353593. The next prime is 91603353613. The reversal of 91603353601 is 10635330619.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 91603353601 - 2³ = 91603353593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91603353631) 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, 119586241 + ... + 119587006.

It is an arithmetic number, because the mean of its divisors is an integer number (22960631808).

Almost surely, 2^91603353601 is an apocalyptic number.

It is an amenable number.

91603353601 is a deficient number, since it is larger than the sum of its proper divisors (239173631).

91603353601 is a wasteful number, since it uses less digits than its factorization.

91603353601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 239173630.

The product of its (nonzero) digits is 43740, while the sum is 37.

The spelling of 91603353601 in words is "ninety-one billion, six hundred three million, three hundred fifty-three thousand, six hundred one".