129418949090 has 64 divisors (see below), whose sum is σ = 249753611520. Its totient is φ = 48175226880.

The previous prime is 129418949063. The next prime is 129418949119. The reversal of 129418949090 is 90949814921.

It is an alternating number because its digits alternate between odd and even.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 1267130 + ... + 1365450.

It is an arithmetic number, because the mean of its divisors is an integer number (3902400180).

Almost surely, 2^129418949090 is an apocalyptic number.

129418949090 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

129418949090 is a deficient number, since it is larger than the sum of its proper divisors (120334662430).

129418949090 is a wasteful number, since it uses less digits than its factorization.

129418949090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98507.

The product of its (nonzero) digits is 1679616, while the sum is 56.

The spelling of 129418949090 in words is "one hundred twenty-nine billion, four hundred eighteen million, nine hundred forty-nine thousand, ninety".