161617707 has 8 divisors (see below), whose sum is σ = 239433680. Its totient is φ = 107745120.

The previous prime is 161617699. The next prime is 161617717. The reversal of 161617707 is 707716161.

It is not a de Polignac number, because 161617707 - 2³ = 161617699 is a prime.

It is a super-2 number, since 2×161617707² = 52240566431875698, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161617717) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2992894 + ... + 2992947.

It is an arithmetic number, because the mean of its divisors is an integer number (29929210).

Almost surely, 2^161617707 is an apocalyptic number.

161617707 is a deficient number, since it is larger than the sum of its proper divisors (77815973).

161617707 is an equidigital number, since it uses as much as digits as its factorization.

161617707 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5985850 (or 5985844 counting only the distinct ones).

The product of its (nonzero) digits is 12348, while the sum is 36.

The square root of 161617707 is about 12712.8953035884. The cubic root of 161617707 is about 544.7070299253.

The spelling of 161617707 in words is "one hundred sixty-one million, six hundred seventeen thousand, seven hundred seven".