63736642520 has 96 divisors (see below), whose sum is σ = 147682997280. Its totient is φ = 24756019200.

The previous prime is 63736642493. The next prime is 63736642559. The reversal of 63736642520 is 2524663736.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 39809720 + ... + 39811320.

It is an arithmetic number, because the mean of its divisors is an integer number (1538364555).

Almost surely, 2^63736642520 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 63736642520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (73841498640).

63736642520 is an abundant number, since it is smaller than the sum of its proper divisors (83946354760).

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

63736642520 is a wasteful number, since it uses less digits than its factorization.

63736642520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2413 (or 2372 counting only the distinct ones).

The product of its (nonzero) digits is 1088640, while the sum is 44.

The spelling of 63736642520 in words is "sixty-three billion, seven hundred thirty-six million, six hundred forty-two thousand, five hundred twenty".