129427049138 has 8 divisors (see below), whose sum is σ = 202581468288. Its totient is φ = 61899893044.

The previous prime is 129427049137. The next prime is 129427049159. The reversal of 129427049138 is 831940724921.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×129427049138² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (129427049137) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1406815706 + ... + 1406815797.

It is an arithmetic number, because the mean of its divisors is an integer number (25322683536).

Almost surely, 2^129427049138 is an apocalyptic number.

129427049138 is a deficient number, since it is larger than the sum of its proper divisors (73154419150).

129427049138 is a wasteful number, since it uses less digits than its factorization.

129427049138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2813631528.

The product of its (nonzero) digits is 870912, while the sum is 50.

The spelling of 129427049138 in words is "one hundred twenty-nine billion, four hundred twenty-seven million, forty-nine thousand, one hundred thirty-eight".