91819101012 has 48 divisors (see below), whose sum is σ = 215150644800. Its totient is φ = 30477045760.

The previous prime is 91819101001. The next prime is 91819101019. The reversal of 91819101012 is 21010191819.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91819101019) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7544212 + ... + 7556372.

It is an arithmetic number, because the mean of its divisors is an integer number (4482305100).

Almost surely, 2^91819101012 is an apocalyptic number.

It is an amenable number.

91819101012 is an abundant number, since it is smaller than the sum of its proper divisors (123331543788).

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

91819101012 is a wasteful number, since it uses less digits than its factorization.

91819101012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14776 (or 14774 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 33.

The spelling of 91819101012 in words is "ninety-one billion, eight hundred nineteen million, one hundred one thousand, twelve".