161289301538304 has 320 divisors, whose sum is σ = 500907657000960. Its totient is φ = 51175867392000.

The previous prime is 161289301538269. The next prime is 161289301538369. The reversal of 161289301538304 is 403835103982161.

It is a happy number.

161289301538304 is a `hidden beast` number, since 1 + 6 + 1 + 28 + 9 + 301 + 5 + 3 + 8 + 304 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 23056219 + ... + 29226149.

It is an arithmetic number, because the mean of its divisors is an integer number (1565336428128).

Almost surely, 2^{161289301538304} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 161289301538304, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (250453828500480).

161289301538304 is an abundant number, since it is smaller than the sum of its proper divisors (339618355462656).

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

161289301538304 is an equidigital number, since it uses as much as digits as its factorization.

161289301538304 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6170050 (or 6170028 counting only the distinct ones).

The product of its (nonzero) digits is 3732480, while the sum is 54.

The spelling of 161289301538304 in words is "one hundred sixty-one trillion, two hundred eighty-nine billion, three hundred one million, five hundred thirty-eight thousand, three hundred four".