91520321054 has 16 divisors (see below), whose sum is σ = 137425572000. Its totient is φ = 45711825120.

The previous prime is 91520321033. The next prime is 91520321063. The reversal of 91520321054 is 45012302519.

It is a self number, because there is not a number n which added to its sum of digits gives 91520321054.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9718052 + ... + 9727464.

It is an arithmetic number, because the mean of its divisors is an integer number (8589098250).

Almost surely, 2^91520321054 is an apocalyptic number.

91520321054 is a deficient number, since it is larger than the sum of its proper divisors (45905250946).

91520321054 is a wasteful number, since it uses less digits than its factorization.

91520321054 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14035.

The product of its (nonzero) digits is 10800, while the sum is 32.

The spelling of 91520321054 in words is "ninety-one billion, five hundred twenty million, three hundred twenty-one thousand, fifty-four".