91910000001 has 8 divisors (see below), whose sum is σ = 122548160160. Its totient is φ = 61272586592.

The previous prime is 91909999957. The next prime is 91910000003. The reversal of 91910000001 is 10000001919.

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

It is a cyclic number.

It is not a de Polignac number, because 91910000001 - 2¹³ = 91909991809 is a prime.

It is not an unprimeable number, because it can be changed into a prime (91910000003) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 239485 + ... + 491093.

It is an arithmetic number, because the mean of its divisors is an integer number (15318520020).

Almost surely, 2^91910000001 is an apocalyptic number.

It is an amenable number.

91910000001 is a deficient number, since it is larger than the sum of its proper divisors (30638160159).

91910000001 is a wasteful number, since it uses less digits than its factorization.

91910000001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 373375.

The product of its (nonzero) digits is 81, while the sum is 21.

It can be divided in two parts, 919 and 10000001, that multiplied together give a palindrome (9190000919).

The spelling of 91910000001 in words is "ninety-one billion, nine hundred ten million, one", and thus it is an aban number.