91138005366 has 16 divisors (see below), whose sum is σ = 182426294064. Its totient is φ = 30354287904.

The previous prime is 91138005289. The next prime is 91138005383. The reversal of 91138005366 is 66350083119.

It is a happy number.

It is a super-2 number, since 2×91138005366² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6253921 + ... + 6268476.

It is an arithmetic number, because the mean of its divisors is an integer number (11401643379).

Almost surely, 2^91138005366 is an apocalyptic number.

91138005366 is an abundant number, since it is smaller than the sum of its proper divisors (91288288698).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

91138005366 is a wasteful number, since it uses less digits than its factorization.

91138005366 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12523615.

The product of its (nonzero) digits is 116640, while the sum is 42.

The spelling of 91138005366 in words is "ninety-one billion, one hundred thirty-eight million, five thousand, three hundred sixty-six".