161065901365 has 8 divisors (see below), whose sum is σ = 193281622488. Its totient is φ = 128851027200.

The previous prime is 161065901317. The next prime is 161065901389. The reversal of 161065901365 is 563109560161.

It can be written as a sum of positive squares in 4 ways, for example, as 25816561 + 161040084804 = 5081^2 + 401298^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 161065901365 - 2⁷ = 161065901237 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 334969 + ... + 659041.

It is an arithmetic number, because the mean of its divisors is an integer number (24160202811).

Almost surely, 2^161065901365 is an apocalyptic number.

It is an amenable number.

161065901365 is a deficient number, since it is larger than the sum of its proper divisors (32215721123).

161065901365 is an equidigital number, since it uses as much as digits as its factorization.

161065901365 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 423479.

The product of its (nonzero) digits is 145800, while the sum is 43.

The spelling of 161065901365 in words is "one hundred sixty-one billion, sixty-five million, nine hundred one thousand, three hundred sixty-five".