161628000646 has 16 divisors (see below), whose sum is σ = 279618562080. Its totient is φ = 68633645760.

The previous prime is 161628000643. The next prime is 161628000649. The reversal of 161628000646 is 646000826161.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (161628000643) and next prime (161628000649).

It is a super-2 number, since 2×161628000646² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 161628000599 and 161628000608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161628000643) 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 7 ways as a sum of consecutive naturals, for example, 52956535 + ... + 52959586.

It is an arithmetic number, because the mean of its divisors is an integer number (17476160130).

Almost surely, 2^161628000646 is an apocalyptic number.

161628000646 is a deficient number, since it is larger than the sum of its proper divisors (117990561434).

161628000646 is a wasteful number, since it uses less digits than its factorization.

161628000646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105916239.

The product of its (nonzero) digits is 82944, while the sum is 40.

The spelling of 161628000646 in words is "one hundred sixty-one billion, six hundred twenty-eight million, six hundred forty-six", and thus it is an aban number.