102891605012 has 96 divisors (see below), whose sum is σ = 217470210048. Its totient is φ = 41643131904.

The previous prime is 102891604987. The next prime is 102891605029. The reversal of 102891605012 is 210506198201.

102891605012 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 29170793 + ... + 29174319.

It is an arithmetic number, because the mean of its divisors is an integer number (2265314688).

Almost surely, 2^102891605012 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 102891605012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (108735105024).

102891605012 is an abundant number, since it is smaller than the sum of its proper divisors (114578605036).

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

102891605012 is a wasteful number, since it uses less digits than its factorization.

102891605012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4125 (or 4123 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 35.

The spelling of 102891605012 in words is "one hundred two billion, eight hundred ninety-one million, six hundred five thousand, twelve".