161626653 has 24 divisors (see below), whose sum is σ = 244075520. Its totient is φ = 102941280.

The previous prime is 161626651. The next prime is 161626669. The reversal of 161626653 is 356626161.

It is not a de Polignac number, because 161626653 - 2¹ = 161626651 is a prime.

It is a super-2 number, since 2×161626653² = 52246349919964818, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161626651) 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 23 ways as a sum of consecutive naturals, for example, 18375 + ... + 25707.

Almost surely, 2^161626653 is an apocalyptic number.

It is an amenable number.

161626653 is a deficient number, since it is larger than the sum of its proper divisors (82448867).

161626653 is a wasteful number, since it uses less digits than its factorization.

161626653 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7449 (or 7446 counting only the distinct ones).

The product of its digits is 38880, while the sum is 36.

The square root of 161626653 is about 12713.2471461857. The cubic root of 161626653 is about 544.7170801013.

The spelling of 161626653 in words is "one hundred sixty-one million, six hundred twenty-six thousand, six hundred fifty-three".