161630234635530 has 64 divisors (see below), whose sum is σ = 400427862912000. Its totient is φ = 41710820866560.

The previous prime is 161630234635477. The next prime is 161630234635579. The reversal of 161630234635530 is 35536432036161.

It is a super-2 number, since 2×161630234635530² (a number of 29 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 161630234635530.

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 31 ways as a sum of consecutive naturals, for example, 295791606 + ... + 296337534.

It is an arithmetic number, because the mean of its divisors is an integer number (6256685358000).

Almost surely, 2^{161630234635530} is an apocalyptic number.

161630234635530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

161630234635530 is an abundant number, since it is smaller than the sum of its proper divisors (238797628276470).

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

161630234635530 is a wasteful number, since it uses less digits than its factorization.

161630234635530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 864319.

The product of its (nonzero) digits is 3499200, while the sum is 48.

The spelling of 161630234635530 in words is "one hundred sixty-one trillion, six hundred thirty billion, two hundred thirty-four million, six hundred thirty-five thousand, five hundred thirty".