63728126540 has 24 divisors (see below), whose sum is σ = 144123609840. Its totient is φ = 23530385088.

The previous prime is 63728126533. The next prime is 63728126543. The reversal of 63728126540 is 4562182736.

It is a super-2 number, since 2×63728126540² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 63728126491 and 63728126500.

It is not an unprimeable number, because it can be changed into a prime (63728126543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 122553830 + ... + 122554349.

It is an arithmetic number, because the mean of its divisors is an integer number (6005150410).

Almost surely, 2^63728126540 is an apocalyptic number.

It is an amenable number.

63728126540 is an abundant number, since it is smaller than the sum of its proper divisors (80395483300).

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

63728126540 is a wasteful number, since it uses less digits than its factorization.

63728126540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 245108201 (or 245108199 counting only the distinct ones).

The product of its (nonzero) digits is 483840, while the sum is 44.

The spelling of 63728126540 in words is "sixty-three billion, seven hundred twenty-eight million, one hundred twenty-six thousand, five hundred forty".