63507128640 has 224 divisors, whose sum is σ = 203463363456. Its totient is φ = 16782458880.

The previous prime is 63507128639. The next prime is 63507128687. The reversal of 63507128640 is 4682170536.

It is a junction number, because it is equal to n+sod(n) for n = 63507128592 and 63507128601.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 65403355 + ... + 65404325.

Almost surely, 2^63507128640 is an apocalyptic number.

63507128640 is a gapful number since it is divisible by the number (60) 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 63507128640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (101731681728).

63507128640 is an abundant number, since it is smaller than the sum of its proper divisors (139956234816).

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

63507128640 is a wasteful number, since it uses less digits than its factorization.

63507128640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1537 (or 1527 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 42.

The spelling of 63507128640 in words is "sixty-three billion, five hundred seven million, one hundred twenty-eight thousand, six hundred forty".