129391817084 has 48 divisors (see below), whose sum is σ = 247605120000. Its totient is φ = 58929538752.

The previous prime is 129391817083. The next prime is 129391817153. The reversal of 129391817084 is 480718193921.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129391817081) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 403937 + ... + 649575.

It is an arithmetic number, because the mean of its divisors is an integer number (5158440000).

Almost surely, 2^129391817084 is an apocalyptic number.

It is an amenable number.

129391817084 is a deficient number, since it is larger than the sum of its proper divisors (118213302916).

129391817084 is a wasteful number, since it uses less digits than its factorization.

129391817084 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 245930 (or 245928 counting only the distinct ones).

The product of its (nonzero) digits is 870912, while the sum is 53.

The spelling of 129391817084 in words is "one hundred twenty-nine billion, three hundred ninety-one million, eight hundred seventeen thousand, eighty-four".