161654999616 has 168 divisors, whose sum is σ = 524200002144. Its totient is φ = 48986311680.

The previous prime is 161654999579. The next prime is 161654999647. The reversal of 161654999616 is 616999456161.

161654999616 is a `hidden beast` number, since 1 + 6 + 1 + 6 + 5 + 4 + 9 + 9 + 9 + 616 = 666.

It is a super-2 number, since 2×161654999616² (a number of 23 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (63) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 301405 + ... + 643548.

It is an arithmetic number, because the mean of its divisors is an integer number (3120238108).

Almost surely, 2^161654999616 is an apocalyptic number.

161654999616 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

161654999616 is an abundant number, since it is smaller than the sum of its proper divisors (362545002528).

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

161654999616 is an equidigital number, since it uses as much as digits as its factorization.

161654999616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 944991 (or 944969 counting only the distinct ones).

The product of its digits is 18895680, while the sum is 63.

The spelling of 161654999616 in words is "one hundred sixty-one billion, six hundred fifty-four million, nine hundred ninety-nine thousand, six hundred sixteen".