161747143684 has 81 divisors (see below), whose sum is σ = 344485349397. Its totient is φ = 66253195008.

The previous prime is 161747143673. The next prime is 161747143699. The reversal of 161747143684 is 486341747161.

The square root of 161747143684 is 402178.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 66191969284 + 95555174400 = 257278^2 + 309120^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 129500692 + ... + 129501940.

Almost surely, 2^161747143684 is an apocalyptic number.

161747143684 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

161747143684 is the 402178-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 161747143684

161747143684 is an abundant number, since it is smaller than the sum of its proper divisors (182738205713).

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

161747143684 is an equidigital number, since it uses as much as digits as its factorization.

161747143684 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2562 (or 1281 counting only the distinct ones).

The product of its digits is 2709504, while the sum is 52.

The spelling of 161747143684 in words is "one hundred sixty-one billion, seven hundred forty-seven million, one hundred forty-three thousand, six hundred eighty-four".