126012729136 has 60 divisors (see below), whose sum is σ = 280910370288. Its totient is φ = 53641426176.

The previous prime is 126012729127. The next prime is 126012729151. The reversal of 126012729136 is 631927210621.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 47071030 + ... + 47073706.

Almost surely, 2^126012729136 is an apocalyptic number.

126012729136 is a gapful number since it is divisible by the number (16) 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 126012729136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (140455185144).

126012729136 is an abundant number, since it is smaller than the sum of its proper divisors (154897641152).

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

126012729136 is an frugal number, since it uses more digits than its factorization.

126012729136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5526 (or 2843 counting only the distinct ones).

The product of its (nonzero) digits is 54432, while the sum is 40.

Adding to 126012729136 its reverse (631927210621), we get a palindrome (757939939757).

The spelling of 126012729136 in words is "one hundred twenty-six billion, twelve million, seven hundred twenty-nine thousand, one hundred thirty-six".