126999552000 has 224 divisors, whose sum is σ = 422638935264. Its totient is φ = 33865728000.

The previous prime is 126999551963. The next prime is 126999552059. The reversal of 126999552000 is 255999621.

It is a happy number.

It is a super-2 number, since 2×126999552000² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3051330 + ... + 3092670.

It is an arithmetic number, because the mean of its divisors is an integer number (1886780961).

Almost surely, 2^126999552000 is an apocalyptic number.

126999552000 is a gapful number since it is divisible by the number (10) 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 126999552000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (211319467632).

126999552000 is an abundant number, since it is smaller than the sum of its proper divisors (295639383264).

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

126999552000 is an frugal number, since it uses more digits than its factorization.

126999552000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41385 (or 41351 counting only the distinct ones).

The product of its (nonzero) digits is 437400, while the sum is 48.

The spelling of 126999552000 in words is "one hundred twenty-six billion, nine hundred ninety-nine million, five hundred fifty-two thousand".