63143072161 has 24 divisors (see below), whose sum is σ = 68858079864. Its totient is φ = 57558159360.

The previous prime is 63143072141. The next prime is 63143072189. The reversal of 63143072161 is 16127034136.

It can be written as a sum of positive squares in 12 ways, for example, as 38462662161 + 24680410000 = 196119^2 + 157100^2 .

It is not a de Polignac number, because 63143072161 - 2⁷ = 63143072033 is a prime.

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (63143072101) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 61843831 + ... + 61844851.

It is an arithmetic number, because the mean of its divisors is an integer number (2869086661).

Almost surely, 2^63143072161 is an apocalyptic number.

It is an amenable number.

63143072161 is a deficient number, since it is larger than the sum of its proper divisors (5715007703).

63143072161 is a wasteful number, since it uses less digits than its factorization.

63143072161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1541 (or 1384 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 34.

The spelling of 63143072161 in words is "sixty-three billion, one hundred forty-three million, seventy-two thousand, one hundred sixty-one".