126985488640 has 72 divisors (see below), whose sum is σ = 311588835768. Its totient is φ = 49555292160.

The previous prime is 126985488583. The next prime is 126985488673. The reversal of 126985488640 is 46884589621.

It can be written as a sum of positive squares in 4 ways, for example, as 1057030144 + 125928458496 = 32512^2 + 354864^2 .

It is a super-2 number, since 2×126985488640² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1157367 + ... + 1262326.

It is an arithmetic number, because the mean of its divisors is an integer number (4327622719).

Almost surely, 2^126985488640 is an apocalyptic number.

126985488640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

126985488640 is an abundant number, since it is smaller than the sum of its proper divisors (184603347128).

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

126985488640 is an equidigital number, since it uses as much as digits as its factorization.

126985488640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2419755 (or 2419741 counting only the distinct ones).

The product of its (nonzero) digits is 26542080, while the sum is 61.

The spelling of 126985488640 in words is "one hundred twenty-six billion, nine hundred eighty-five million, four hundred eighty-eight thousand, six hundred forty".