129940611840 has 648 divisors, whose sum is σ = 502761796992. Its totient is φ = 30939217920.

The previous prime is 129940611793. The next prime is 129940611869. The reversal of 129940611840 is 48116049921.

It is a happy number.

129940611840 is a `hidden beast` number, since 1 + 2 + 99 + 406 + 118 + 40 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 60352204 + ... + 60354356.

Almost surely, 2^129940611840 is an apocalyptic number.

129940611840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 129940611840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (251380898496).

129940611840 is an abundant number, since it is smaller than the sum of its proper divisors (372821185152).

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

129940611840 is a wasteful number, since it uses less digits than its factorization.

129940611840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2237 (or 2207 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 45.

The spelling of 129940611840 in words is "one hundred twenty-nine billion, nine hundred forty million, six hundred eleven thousand, eight hundred forty".