63488376961 has 3 divisors (see below), whose sum is σ = 63488628931. Its totient is φ = 63488124992.

The previous prime is 63488376949. The next prime is 63488376967. The reversal of 63488376961 is 16967388436.

The square root of 63488376961 is 251969.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 26270250561 + 37218126400 = 162081^2 + 192920^2 .

It is not a de Polignac number, because 63488376961 - 2⁹ = 63488376449 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 63488376961.

It is not an unprimeable number, because it can be changed into a prime (63488376967) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 125985 + ... + 377953.

Almost surely, 2^63488376961 is an apocalyptic number.

63488376961 is the 251969-th square number.

63488376961 is the 125985-th centered octagonal number.

It is an amenable number.

63488376961 is a deficient number, since it is larger than the sum of its proper divisors (251970).

63488376961 is an frugal number, since it uses more digits than its factorization.

63488376961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 503938 (or 251969 counting only the distinct ones).

The product of its digits is 31352832, while the sum is 61.

The spelling of 63488376961 in words is "sixty-three billion, four hundred eighty-eight million, three hundred seventy-six thousand, nine hundred sixty-one".