129391940284 has 6 divisors (see below), whose sum is σ = 226435895504. Its totient is φ = 64695970140.

The previous prime is 129391940281. The next prime is 129391940291. The reversal of 129391940284 is 482049193921.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129391940281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16173992532 + ... + 16173992539.

Almost surely, 2^129391940284 is an apocalyptic number.

It is an amenable number.

129391940284 is a deficient number, since it is larger than the sum of its proper divisors (97043955220).

129391940284 is a wasteful number, since it uses less digits than its factorization.

129391940284 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32347985075 (or 32347985073 counting only the distinct ones).

The product of its (nonzero) digits is 1119744, while the sum is 52.

The spelling of 129391940284 in words is "one hundred twenty-nine billion, three hundred ninety-one million, nine hundred forty thousand, two hundred eighty-four".