126543000640 has 448 divisors, whose sum is σ = 377069299200. Its totient is φ = 39462764544.

The previous prime is 126543000611. The next prime is 126543000659. The reversal of 126543000640 is 46000345621.

It is a tau number, because it is divible by the number of its divisors (448).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 178480606 + ... + 178481314.

Almost surely, 2^126543000640 is an apocalyptic number.

126543000640 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 126543000640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (188534649600).

126543000640 is an abundant number, since it is smaller than the sum of its proper divisors (250526298560).

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

126543000640 is a wasteful number, since it uses less digits than its factorization.

126543000640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 902 (or 892 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 31.

The spelling of 126543000640 in words is "one hundred twenty-six billion, five hundred forty-three million, six hundred forty", and thus it is an aban number.