91712624212 has 48 divisors (see below), whose sum is σ = 176644448064. Its totient is φ = 41661655200.

The previous prime is 91712624209. The next prime is 91712624221. The reversal of 91712624212 is 21242621719.

It is a super-2 number, since 2×91712624212² (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 15 ways as a sum of consecutive naturals, for example, 10499887 + ... + 10508617.

It is an arithmetic number, because the mean of its divisors is an integer number (3680092668).

Almost surely, 2^91712624212 is an apocalyptic number.

It is an amenable number.

91712624212 is a deficient number, since it is larger than the sum of its proper divisors (84931823852).

91712624212 is a wasteful number, since it uses less digits than its factorization.

91712624212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10741 (or 10717 counting only the distinct ones).

The product of its digits is 24192, while the sum is 37.

The spelling of 91712624212 in words is "ninety-one billion, seven hundred twelve million, six hundred twenty-four thousand, two hundred twelve".