161296761 has 8 divisors (see below), whose sum is σ = 215857024. Its totient is φ = 107133840.

The previous prime is 161296739. The next prime is 161296777. The reversal of 161296761 is 167692161.

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

It is not a de Polignac number, because 161296761 - 2⁷ = 161296633 is a prime.

It is a super-2 number, since 2×161296761² = 52033290218182242, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161296781) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 98386 + ... + 100011.

It is an arithmetic number, because the mean of its divisors is an integer number (26982128).

Almost surely, 2^161296761 is an apocalyptic number.

It is an amenable number.

161296761 is a deficient number, since it is larger than the sum of its proper divisors (54560263).

161296761 is a wasteful number, since it uses less digits than its factorization.

161296761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 198671.

The product of its digits is 27216, while the sum is 39.

The square root of 161296761 is about 12700.2661783130. The cubic root of 161296761 is about 544.3462250034.

The spelling of 161296761 in words is "one hundred sixty-one million, two hundred ninety-six thousand, seven hundred sixty-one".