102128431744 has 64 divisors (see below), whose sum is σ = 208641644640. Its totient is φ = 49768621056.

The previous prime is 102128431687. The next prime is 102128431747. The reversal of 102128431744 is 447134821201.

It is a tau number, because it is divible by the number of its divisors (64).

It is not an unprimeable number, because it can be changed into a prime (102128431747) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2550502 + ... + 2590234.

Almost surely, 2^102128431744 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 102128431744, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (104320822320).

102128431744 is an abundant number, since it is smaller than the sum of its proper divisors (106513212896).

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

102128431744 is an equidigital number, since it uses as much as digits as its factorization.

102128431744 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40257 (or 40245 counting only the distinct ones).

The product of its (nonzero) digits is 43008, while the sum is 37.

The spelling of 102128431744 in words is "one hundred two billion, one hundred twenty-eight million, four hundred thirty-one thousand, seven hundred forty-four".