63628806145 has 4 divisors (see below), whose sum is σ = 76354567380. Its totient is φ = 50903044912.

The previous prime is 63628806121. The next prime is 63628806149. The reversal of 63628806145 is 54160882636.

It is a happy number.

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 30740258241 + 32888547904 = 175329^2 + 181352^2 .

It is a cyclic number.

It is not a de Polignac number, because 63628806145 - 2¹⁷ = 63628675073 is a prime.

It is a super-2 number, since 2×63628806145² (a number of 22 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (63628806149) 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, 6362880610 + ... + 6362880619.

It is an arithmetic number, because the mean of its divisors is an integer number (19088641845).

Almost surely, 2^63628806145 is an apocalyptic number.

It is an amenable number.

63628806145 is a deficient number, since it is larger than the sum of its proper divisors (12725761235).

63628806145 is a wasteful number, since it uses less digits than its factorization.

63628806145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12725761234.

The product of its (nonzero) digits is 1658880, while the sum is 49.

The spelling of 63628806145 in words is "sixty-three billion, six hundred twenty-eight million, eight hundred six thousand, one hundred forty-five".