63161332785 has 48 divisors (see below), whose sum is σ = 111408382800. Its totient is φ = 33093918720.

The previous prime is 63161332781. The next prime is 63161332807. The reversal of 63161332785 is 58723316136.

63161332785 is a `hidden beast` number, since 6 + 3 + 1 + 613 + 3 + 27 + 8 + 5 = 666.

It can be written as a sum of positive squares in 8 ways, for example, as 3416285601 + 59745047184 = 58449^2 + 244428^2 .

It is not a de Polignac number, because 63161332785 - 2² = 63161332781 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 63161332785.

It is not an unprimeable number, because it can be changed into a prime (63161332781) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2339041 + ... + 2365889.

It is an arithmetic number, because the mean of its divisors is an integer number (2321007975).

Almost surely, 2^63161332785 is an apocalyptic number.

It is an amenable number.

63161332785 is a deficient number, since it is larger than the sum of its proper divisors (48247050015).

63161332785 is a wasteful number, since it uses less digits than its factorization.

63161332785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27778 (or 27775 counting only the distinct ones).

The product of its digits is 544320, while the sum is 45.

The spelling of 63161332785 in words is "sixty-three billion, one hundred sixty-one million, three hundred thirty-two thousand, seven hundred eighty-five".