161797900049280 has 480 divisors, whose sum is σ = 635112962142120. Its totient is φ = 39223731824640.

The previous prime is 161797900049267. The next prime is 161797900049323. The reversal of 161797900049280 is 82940009797161.

161797900049280 is a `hidden beast` number, since 1 + 6 + 1 + 79 + 79 + 0 + 0 + 0 + 492 + 8 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (480).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 6624474 + ... + 19169753.

Almost surely, 2^{161797900049280} is an apocalyptic number.

161797900049280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

161797900049280 is an abundant number, since it is smaller than the sum of its proper divisors (473315062092840).

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

161797900049280 is a wasteful number, since it uses less digits than its factorization.

161797900049280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25794280 (or 25794248 counting only the distinct ones).

The product of its (nonzero) digits is 13716864, while the sum is 63.

The spelling of 161797900049280 in words is "one hundred sixty-one trillion, seven hundred ninety-seven billion, nine hundred million, forty-nine thousand, two hundred eighty".