91000060915 has 8 divisors (see below), whose sum is σ = 112965593040. Its totient is φ = 70289702112.

The previous prime is 91000060889. The next prime is 91000060919. The reversal of 91000060915 is 51906000019.

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 91000060915 - 2¹¹ = 91000058867 is a prime.

It is a super-2 number, since 2×91000060915² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (91000060919) 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 in 7 ways as a sum of consecutive naturals, for example, 313793169 + ... + 313793458.

It is an arithmetic number, because the mean of its divisors is an integer number (14120699130).

Almost surely, 2^91000060915 is an apocalyptic number.

91000060915 is a deficient number, since it is larger than the sum of its proper divisors (21965532125).

91000060915 is a wasteful number, since it uses less digits than its factorization.

91000060915 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 627586661.

The product of its (nonzero) digits is 2430, while the sum is 31.

The spelling of 91000060915 in words is "ninety-one billion, sixty thousand, nine hundred fifteen".