91005051010 has 16 divisors (see below), whose sum is σ = 164248265016. Its totient is φ = 36304426368.

The previous prime is 91005050999. The next prime is 91005051019. The reversal of 91005051010 is 1015050019.

It can be written as a sum of positive squares in 4 ways, for example, as 54788296761 + 36216754249 = 234069^2 + 190307^2 .

It is not an unprimeable number, because it can be changed into a prime (91005051019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12195339 + ... + 12202798.

Almost surely, 2^91005051010 is an apocalyptic number.

91005051010 is a deficient number, since it is larger than the sum of its proper divisors (73243214006).

91005051010 is a wasteful number, since it uses less digits than its factorization.

91005051010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24398517.

The product of its (nonzero) digits is 225, while the sum is 22.

The spelling of 91005051010 in words is "ninety-one billion, five million, fifty-one thousand, ten".