63865059552 has 192 divisors, whose sum is σ = 213646809600. Its totient is φ = 18181739520.

The previous prime is 63865059523. The next prime is 63865059563. The reversal of 63865059552 is 25595056836.

63865059552 is a `hidden beast` number, since 6 + 3 + 86 + 5 + 0 + 5 + 9 + 552 = 666.

It is a hoax number, since the sum of its digits (54) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (54).

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, 1680699 + ... + 1718277.

It is an arithmetic number, because the mean of its divisors is an integer number (1112743800).

Almost surely, 2^63865059552 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 63865059552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (106823404800).

63865059552 is an abundant number, since it is smaller than the sum of its proper divisors (149781750048).

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

63865059552 is a wasteful number, since it uses less digits than its factorization.

63865059552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37886 (or 37872 counting only the distinct ones).

The product of its (nonzero) digits is 9720000, while the sum is 54.

The spelling of 63865059552 in words is "sixty-three billion, eight hundred sixty-five million, fifty-nine thousand, five hundred fifty-two".