102128440090 has 16 divisors (see below), whose sum is σ = 186946976160. Its totient is φ = 40158979600.

The previous prime is 102128440069. The next prime is 102128440091. The reversal of 102128440090 is 90044821201.

It is not an unprimeable number, because it can be changed into a prime (102128440091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 86548936 + ... + 86550115.

It is an arithmetic number, because the mean of its divisors is an integer number (11684186010).

Almost surely, 2^102128440090 is an apocalyptic number.

102128440090 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

102128440090 is a deficient number, since it is larger than the sum of its proper divisors (84818536070).

102128440090 is a wasteful number, since it uses less digits than its factorization.

102128440090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173099117.

The product of its (nonzero) digits is 4608, while the sum is 31.

The spelling of 102128440090 in words is "one hundred two billion, one hundred twenty-eight million, four hundred forty thousand, ninety".