129734851830 has 32 divisors (see below), whose sum is σ = 312547555584. Its totient is φ = 34464414816.

The previous prime is 129734851819. The next prime is 129734851837. The reversal of 129734851830 is 38158437921.

It is a super-2 number, since 2×129734851830² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129734851837) 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, 8213584 + ... + 8229363.

It is an arithmetic number, because the mean of its divisors is an integer number (9767111112).

Almost surely, 2^129734851830 is an apocalyptic number.

129734851830 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

129734851830 is an abundant number, since it is smaller than the sum of its proper divisors (182812703754).

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

129734851830 is a wasteful number, since it uses less digits than its factorization.

129734851830 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16443220.

The product of its (nonzero) digits is 1451520, while the sum is 51.

The spelling of 129734851830 in words is "one hundred twenty-nine billion, seven hundred thirty-four million, eight hundred fifty-one thousand, eight hundred thirty".