63525372609 has 4 divisors (see below), whose sum is σ = 84700496816. Its totient is φ = 42350248404.

The previous prime is 63525372569. The next prime is 63525372613. The reversal of 63525372609 is 90627352536.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 63525372609 - 2²⁷ = 63391154881 is a prime.

It is a super-2 number, since 2×63525372609² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (63525372619) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10587562099 + ... + 10587562104.

It is an arithmetic number, because the mean of its divisors is an integer number (21175124204).

Almost surely, 2^63525372609 is an apocalyptic number.

It is an amenable number.

63525372609 is a deficient number, since it is larger than the sum of its proper divisors (21175124207).

63525372609 is a wasteful number, since it uses less digits than its factorization.

63525372609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21175124206.

The product of its (nonzero) digits is 2041200, while the sum is 48.

The spelling of 63525372609 in words is "sixty-three billion, five hundred twenty-five million, three hundred seventy-two thousand, six hundred nine".