129319441890 has 64 divisors (see below), whose sum is σ = 328422408192. Its totient is φ = 32521227200.

The previous prime is 129319441879. The next prime is 129319441903. The reversal of 129319441890 is 98144913921.

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, 1270866 + ... + 1368845.

It is an arithmetic number, because the mean of its divisors is an integer number (5131600128).

Almost surely, 2^129319441890 is an apocalyptic number.

129319441890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

129319441890 is an abundant number, since it is smaller than the sum of its proper divisors (199102966302).

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

129319441890 is a wasteful number, since it uses less digits than its factorization.

129319441890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2639815.

The product of its (nonzero) digits is 559872, while the sum is 51.

The spelling of 129319441890 in words is "one hundred twenty-nine billion, three hundred nineteen million, four hundred forty-one thousand, eight hundred ninety".