63725544357 has 4 divisors (see below), whose sum is σ = 84967392480. Its totient is φ = 42483696236.

The previous prime is 63725544317. The next prime is 63725544371. The reversal of 63725544357 is 75344552736.

It is a happy number.

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 63725544357 - 2¹² = 63725540261 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63725544317) 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, 10620924057 + ... + 10620924062.

It is an arithmetic number, because the mean of its divisors is an integer number (21241848120).

Almost surely, 2^63725544357 is an apocalyptic number.

It is an amenable number.

63725544357 is a deficient number, since it is larger than the sum of its proper divisors (21241848123).

63725544357 is a wasteful number, since it uses less digits than its factorization.

63725544357 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21241848122.

The product of its digits is 10584000, while the sum is 51.

The spelling of 63725544357 in words is "sixty-three billion, seven hundred twenty-five million, five hundred forty-four thousand, three hundred fifty-seven".