91626719970 has 32 divisors (see below), whose sum is σ = 221360457600. Its totient is φ = 24271977600.

The previous prime is 91626719957. The next prime is 91626719971. The reversal of 91626719970 is 7991762619.

It is a self number, because there is not a number n which added to its sum of digits gives 91626719970.

It is not an unprimeable number, because it can be changed into a prime (91626719971) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 10108795 + ... + 10117854.

It is an arithmetic number, because the mean of its divisors is an integer number (6917514300).

Almost surely, 2^91626719970 is an apocalyptic number.

91626719970 is an abundant number, since it is smaller than the sum of its proper divisors (129733737630).

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

91626719970 is a wasteful number, since it uses less digits than its factorization.

91626719970 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20226810.

The product of its (nonzero) digits is 2571912, while the sum is 57.

The spelling of 91626719970 in words is "ninety-one billion, six hundred twenty-six million, seven hundred nineteen thousand, nine hundred seventy".