8463861661312 has 16 divisors (see below), whose sum is σ = 16861599403650. Its totient is φ = 4231930830592.

The previous prime is 8463861661291. The next prime is 8463861661319. The reversal of 8463861661312 is 2131661683648.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 8106228956736 + 357632704576 = 2847144^2 + 598024^2 .

It is a tau number, because it is divible by the number of its divisors (16).

It is a super-2 number, since 2×8463861661312² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (8463861661319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33061959487 + ... + 33061959742.

Almost surely, 2^{8463861661312} is an apocalyptic number.

It is an amenable number.

8463861661312 is a deficient number, since it is larger than the sum of its proper divisors (8397737742338).

8463861661312 is an equidigital number, since it uses as much as digits as its factorization.

8463861661312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66123919243 (or 66123919231 counting only the distinct ones).

The product of its digits is 5971968, while the sum is 55.

The spelling of 8463861661312 in words is "eight trillion, four hundred sixty-three billion, eight hundred sixty-one million, six hundred sixty-one thousand, three hundred twelve".