86161216961 has 4 divisors (see below), whose sum is σ = 86162102832. Its totient is φ = 86160331092.

The previous prime is 86161216927. The next prime is 86161216997. The reversal of 86161216961 is 16961216168.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 86161216961 - 2²² = 86157022657 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (86161213961) 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 3 ways as a sum of consecutive naturals, for example, 276095 + ... + 498548.

It is an arithmetic number, because the mean of its divisors is an integer number (21540525708).

Almost surely, 2^86161216961 is an apocalyptic number.

It is an amenable number.

86161216961 is a deficient number, since it is larger than the sum of its proper divisors (885871).

86161216961 is a wasteful number, since it uses less digits than its factorization.

86161216961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 885870.

The product of its digits is 186624, while the sum is 47.

The spelling of 86161216961 in words is "eighty-six billion, one hundred sixty-one million, two hundred sixteen thousand, nine hundred sixty-one".