63645254357 has 16 divisors (see below), whose sum is σ = 65599801344. Its totient is φ = 61710480000.

The previous prime is 63645254317. The next prime is 63645254369. The reversal of 63645254357 is 75345254636.

63645254357 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 63645254357 - 2⁶ = 63645254293 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63645254317) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10185008 + ... + 10191254.

It is an arithmetic number, because the mean of its divisors is an integer number (4099987584).

Almost surely, 2^63645254357 is an apocalyptic number.

It is an amenable number.

63645254357 is a deficient number, since it is larger than the sum of its proper divisors (1954546987).

63645254357 is a wasteful number, since it uses less digits than its factorization.

63645254357 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7780.

The product of its digits is 9072000, while the sum is 50.

The spelling of 63645254357 in words is "sixty-three billion, six hundred forty-five million, two hundred fifty-four thousand, three hundred fifty-seven".