161628827620 has 48 divisors (see below), whose sum is σ = 365665261248. Its totient is φ = 59656222080.

The previous prime is 161628827593. The next prime is 161628827639. The reversal of 161628827620 is 26728826161.

161628827620 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×161628827620² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 596247 + ... + 823873.

It is an arithmetic number, because the mean of its divisors is an integer number (7618026276).

Almost surely, 2^161628827620 is an apocalyptic number.

161628827620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

161628827620 is an abundant number, since it is smaller than the sum of its proper divisors (204036433628).

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

161628827620 is a wasteful number, since it uses less digits than its factorization.

161628827620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 230380 (or 230378 counting only the distinct ones).

The product of its (nonzero) digits is 774144, while the sum is 49.

The spelling of 161628827620 in words is "one hundred sixty-one billion, six hundred twenty-eight million, eight hundred twenty-seven thousand, six hundred twenty".