63487873025 has 24 divisors (see below), whose sum is σ = 79277451960. Its totient is φ = 50434583040.

The previous prime is 63487873003. The next prime is 63487873027. The reversal of 63487873025 is 52037878436.

It is a Cunningham number, because it is equal to 251968²+1.

It can be written as a sum of positive squares in 12 ways, for example, as 19598880016 + 43888993009 = 139996^2 + 209497^2 .

It is not a de Polignac number, because 63487873025 - 2¹² = 63487868929 is a prime.

It is a super-4 number, since 4×63487873025⁴ (a number of 44 digits) contains 4444 as substring.

It is not an unprimeable number, because it can be changed into a prime (63487873027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3680621 + ... + 3697829.

It is an arithmetic number, because the mean of its divisors is an integer number (3303227165).

Almost surely, 2^63487873025 is an apocalyptic number.

It is an amenable number.

63487873025 is a deficient number, since it is larger than the sum of its proper divisors (15789578935).

63487873025 is a wasteful number, since it uses less digits than its factorization.

63487873025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18245 (or 18240 counting only the distinct ones).

The product of its (nonzero) digits is 6773760, while the sum is 53.

The spelling of 63487873025 in words is "sixty-three billion, four hundred eighty-seven million, eight hundred seventy-three thousand, twenty-five".