161061302661 has 8 divisors (see below), whose sum is σ = 245426746944. Its totient is φ = 92035030080.

The previous prime is 161061302657. The next prime is 161061302687. The reversal of 161061302661 is 166203160161.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 161061302661 - 2² = 161061302657 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161061302761) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3834792900 + ... + 3834792941.

It is an arithmetic number, because the mean of its divisors is an integer number (30678343368).

Almost surely, 2^161061302661 is an apocalyptic number.

It is an amenable number.

161061302661 is a deficient number, since it is larger than the sum of its proper divisors (84365444283).

161061302661 is an equidigital number, since it uses as much as digits as its factorization.

161061302661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7669585851.

The product of its (nonzero) digits is 7776, while the sum is 33.

The spelling of 161061302661 in words is "one hundred sixty-one billion, sixty-one million, three hundred two thousand, six hundred sixty-one".