63645373052 has 12 divisors (see below), whose sum is σ = 114095973936. Its totient is φ = 31046523360.

The previous prime is 63645373021. The next prime is 63645373061. The reversal of 63645373052 is 25037354636.

It is a junction number, because it is equal to n+sod(n) for n = 63645372994 and 63645373012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 194040608 + ... + 194040935.

It is an arithmetic number, because the mean of its divisors is an integer number (9507997828).

Almost surely, 2^63645373052 is an apocalyptic number.

It is an amenable number.

63645373052 is a deficient number, since it is larger than the sum of its proper divisors (50450600884).

63645373052 is a wasteful number, since it uses less digits than its factorization.

63645373052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 388081588 (or 388081586 counting only the distinct ones).

The product of its (nonzero) digits is 1360800, while the sum is 44.

The spelling of 63645373052 in words is "sixty-three billion, six hundred forty-five million, three hundred seventy-three thousand, fifty-two".