161626669628 has 12 divisors (see below), whose sum is σ = 282896763912. Its totient is φ = 80799022800.

The previous prime is 161626669627. The next prime is 161626669643. The reversal of 161626669628 is 826966626161.

It is a super-2 number, since 2×161626669628² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161626669627) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3552575 + ... + 3597782.

It is an arithmetic number, because the mean of its divisors is an integer number (23574730326).

Almost surely, 2^161626669628 is an apocalyptic number.

It is an amenable number.

161626669628 is a deficient number, since it is larger than the sum of its proper divisors (121270094284).

161626669628 is a wasteful number, since it uses less digits than its factorization.

161626669628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7156012 (or 7156010 counting only the distinct ones).

The product of its digits is 13436928, while the sum is 59.

The spelling of 161626669628 in words is "one hundred sixty-one billion, six hundred twenty-six million, six hundred sixty-nine thousand, six hundred twenty-eight".