63772638552 has 128 divisors (see below), whose sum is σ = 202629081600. Its totient is φ = 18204891264.

The previous prime is 63772638539. The next prime is 63772638557. The reversal of 63772638552 is 25583627736.

It is a happy number.

63772638552 is a `hidden beast` number, since 6 + 37 + 7 + 26 + 38 + 552 = 666.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63772638557) 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 31 ways as a sum of consecutive naturals, for example, 1776978 + ... + 1812510.

It is an arithmetic number, because the mean of its divisors is an integer number (1583039700).

Almost surely, 2^63772638552 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 63772638552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (101314540800).

63772638552 is an abundant number, since it is smaller than the sum of its proper divisors (138856443048).

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

63772638552 is a wasteful number, since it uses less digits than its factorization.

63772638552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36742 (or 36732 counting only the distinct ones).

The product of its digits is 12700800, while the sum is 54.

The spelling of 63772638552 in words is "sixty-three billion, seven hundred seventy-two million, six hundred thirty-eight thousand, five hundred fifty-two".