63629928545 has 4 divisors (see below), whose sum is σ = 76355914260. Its totient is φ = 50903942832.

The previous prime is 63629928539. The next prime is 63629928553. The reversal of 63629928545 is 54582992636.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 18811768336 + 44818160209 = 137156^2 + 211703^2 .

It is a cyclic number.

It is not a de Polignac number, because 63629928545 - 2²⁰ = 63628879969 is a prime.

It is a Curzon 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, 6362992850 + ... + 6362992859.

It is an arithmetic number, because the mean of its divisors is an integer number (19088978565).

Almost surely, 2^63629928545 is an apocalyptic number.

It is an amenable number.

63629928545 is a deficient number, since it is larger than the sum of its proper divisors (12725985715).

63629928545 is a wasteful number, since it uses less digits than its factorization.

63629928545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12725985714.

The product of its digits is 27993600, while the sum is 59.

The spelling of 63629928545 in words is "sixty-three billion, six hundred twenty-nine million, nine hundred twenty-eight thousand, five hundred forty-five".