161606626 has 4 divisors (see below), whose sum is σ = 242409942. Its totient is φ = 80803312.

The previous prime is 161606617. The next prime is 161606651. The reversal of 161606626 is 626606161.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 626606161 = 29 ⋅21607109.

It can be written as a sum of positive squares in only one way, i.e., 155027401 + 6579225 = 12451^2 + 2565^2 .

It is a super-2 number, since 2×161606626² = 52233403134207752, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 161606591 and 161606600.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40401655 + ... + 40401658.

Almost surely, 2^161606626 is an apocalyptic number.

161606626 is a deficient number, since it is larger than the sum of its proper divisors (80803316).

161606626 is an equidigital number, since it uses as much as digits as its factorization.

161606626 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80803315.

The product of its (nonzero) digits is 15552, while the sum is 34.

The square root of 161606626 is about 12712.4594787948. The cubic root of 161606626 is about 544.6945807190.

The spelling of 161606626 in words is "one hundred sixty-one million, six hundred six thousand, six hundred twenty-six".