91385039708 has 24 divisors (see below), whose sum is σ = 175660033920. Its totient is φ = 41405577840.

The previous prime is 91385039677. The next prime is 91385039719. The reversal of 91385039708 is 80793058319.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 91385039708.

It is a congruent number.

It is an unprimeable number.

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, 26138138 + ... + 26141633.

It is an arithmetic number, because the mean of its divisors is an integer number (7319168080).

Almost surely, 2^91385039708 is an apocalyptic number.

It is an amenable number.

91385039708 is a deficient number, since it is larger than the sum of its proper divisors (84274994212).

91385039708 is a wasteful number, since it uses less digits than its factorization.

91385039708 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52279817 (or 52279815 counting only the distinct ones).

The product of its (nonzero) digits is 1632960, while the sum is 53.

The spelling of 91385039708 in words is "ninety-one billion, three hundred eighty-five million, thirty-nine thousand, seven hundred eight".