161626020 has 24 divisors (see below), whose sum is σ = 452553024. Its totient is φ = 43100256.

The previous prime is 161625979. The next prime is 161626039. The reversal of 161626020 is 20626161.

It is a super-2 number, since 2×161626020² = 52245940682080800, which contains 22 as substring.

It is an unprimeable number.

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, 1346824 + ... + 1346943.

It is an arithmetic number, because the mean of its divisors is an integer number (18856376).

Almost surely, 2^161626020 is an apocalyptic number.

161626020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

161626020 is an abundant number, since it is smaller than the sum of its proper divisors (290927004).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

161626020 is a wasteful number, since it uses less digits than its factorization.

161626020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2693779 (or 2693777 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 24.

The square root of 161626020 is about 12713.2222508694. Note that the first 4 decimals coincide. The cubic root of 161626020 is about 544.7163689843.

The spelling of 161626020 in words is "one hundred sixty-one million, six hundred twenty-six thousand, twenty".