161810330761 has 16 divisors (see below), whose sum is σ = 165967200000. Its totient is φ = 157703804496.

The previous prime is 161810330701. The next prime is 161810330789. The reversal of 161810330761 is 167033018161.

It is a cyclic number.

It is not a de Polignac number, because 161810330761 - 2¹⁵ = 161810297993 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 161810330761.

It is not an unprimeable number, because it can be changed into a prime (161810330701) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6047190 + ... + 6073888.

It is an arithmetic number, because the mean of its divisors is an integer number (10372950000).

Almost surely, 2^161810330761 is an apocalyptic number.

It is an amenable number.

161810330761 is a deficient number, since it is larger than the sum of its proper divisors (4156869239).

161810330761 is a wasteful number, since it uses less digits than its factorization.

161810330761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27636.

The product of its (nonzero) digits is 18144, while the sum is 37.

The spelling of 161810330761 in words is "one hundred sixty-one billion, eight hundred ten million, three hundred thirty thousand, seven hundred sixty-one".