126999871488 has 840 divisors, whose sum is σ = 458423436800. Its totient is φ = 35115171840.

The previous prime is 126999871487. The next prime is 126999871501. The reversal of 126999871488 is 884178999621.

126999871488 is a `hidden beast` number, since 1 + 2 + 69 + 9 + 9 + 87 + 1 + 488 = 666.

It is a super-2 number, since 2×126999871488² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (126999871487) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 4096770033 + ... + 4096770063.

Almost surely, 2^126999871488 is an apocalyptic number.

126999871488 is a gapful number since it is divisible by the number (18) 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 126999871488, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (229211718400).

126999871488 is an abundant number, since it is smaller than the sum of its proper divisors (331423565312).

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

126999871488 is an frugal number, since it uses more digits than its factorization.

126999871488 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98 (or 43 counting only the distinct ones).

The product of its digits is 125411328, while the sum is 72.

The spelling of 126999871488 in words is "one hundred twenty-six billion, nine hundred ninety-nine million, eight hundred seventy-one thousand, four hundred eighty-eight".