129787053408 has 192 divisors, whose sum is σ = 391347633600. Its totient is φ = 41818705920.

The previous prime is 129787053397. The next prime is 129787053419. The reversal of 129787053408 is 804350787921.

It is a happy number.

129787053408 is a `hidden beast` number, since 1 + 29 + 7 + 87 + 0 + 534 + 0 + 8 = 666.

It is an interprime number because it is at equal distance from previous prime (129787053397) and next prime (129787053419).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

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, 3844410 + ... + 3878022.

It is an arithmetic number, because the mean of its divisors is an integer number (2038268925).

Almost surely, 2^129787053408 is an apocalyptic number.

129787053408 is a gapful number since it is divisible by the number (18) 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 129787053408, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (195673816800).

129787053408 is an abundant number, since it is smaller than the sum of its proper divisors (261560580192).

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

129787053408 is a wasteful number, since it uses less digits than its factorization.

129787053408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33782 (or 33768 counting only the distinct ones).

The product of its (nonzero) digits is 3386880, while the sum is 54.

The spelling of 129787053408 in words is "one hundred twenty-nine billion, seven hundred eighty-seven million, fifty-three thousand, four hundred eight".