63525213257 has 4 divisors (see below), whose sum is σ = 69300232656. Its totient is φ = 57750193860.

The previous prime is 63525213253. The next prime is 63525213293. The reversal of 63525213257 is 75231252536.

63525213257 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 a cyclic number.

It is not a de Polignac number, because 63525213257 - 2² = 63525213253 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (63525213253) 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, 2887509683 + ... + 2887509704.

It is an arithmetic number, because the mean of its divisors is an integer number (17325058164).

Almost surely, 2^63525213257 is an apocalyptic number.

It is an amenable number.

63525213257 is a deficient number, since it is larger than the sum of its proper divisors (5775019399).

63525213257 is a wasteful number, since it uses less digits than its factorization.

63525213257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5775019398.

The product of its digits is 378000, while the sum is 41.

The spelling of 63525213257 in words is "sixty-three billion, five hundred twenty-five million, two hundred thirteen thousand, two hundred fifty-seven".