129730752140 has 24 divisors (see below), whose sum is σ = 297201359952. Its totient is φ = 47174818880.

The previous prime is 129730752097. The next prime is 129730752149. The reversal of 129730752140 is 41257037921.

It is a happy number.

It is a super-2 number, since 2×129730752140² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (129730752149) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 294842399 + ... + 294842838.

It is an arithmetic number, because the mean of its divisors is an integer number (12383389998).

Almost surely, 2^129730752140 is an apocalyptic number.

129730752140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

129730752140 is an abundant number, since it is smaller than the sum of its proper divisors (167470607812).

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

129730752140 is a wasteful number, since it uses less digits than its factorization.

129730752140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 589685257 (or 589685255 counting only the distinct ones).

The product of its (nonzero) digits is 105840, while the sum is 41.

The spelling of 129730752140 in words is "one hundred twenty-nine billion, seven hundred thirty million, seven hundred fifty-two thousand, one hundred forty".