63894500645 has 16 divisors (see below), whose sum is σ = 80843206080. Its totient is φ = 48344688000.

The previous prime is 63894500639. The next prime is 63894500651. The reversal of 63894500645 is 54600549836.

It is an interprime number because it is at equal distance from previous prime (63894500639) and next prime (63894500651).

It is not a de Polignac number, because 63894500645 - 2¹⁶ = 63894435109 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 63894500593 and 63894500602.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 502451 + ... + 616640.

It is an arithmetic number, because the mean of its divisors is an integer number (5052700380).

Almost surely, 2^63894500645 is an apocalyptic number.

It is an amenable number.

63894500645 is a deficient number, since it is larger than the sum of its proper divisors (16948705435).

63894500645 is a wasteful number, since it uses less digits than its factorization.

63894500645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1119716.

The product of its (nonzero) digits is 3110400, while the sum is 50.

The spelling of 63894500645 in words is "sixty-three billion, eight hundred ninety-four million, five hundred thousand, six hundred forty-five".