36503720161 has 4 divisors (see below), whose sum is σ = 37192469652. Its totient is φ = 35814970672.

The previous prime is 36503720119. The next prime is 36503720177. The reversal of 36503720161 is 16102730563.

36503720161 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 16102730563 = 107 ⋅150492809.

It can be written as a sum of positive squares in 2 ways, for example, as 31127897761 + 5375822400 = 176431^2 + 73320^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-36503720161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (36503720111) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 344374666 + ... + 344374771.

It is an arithmetic number, because the mean of its divisors is an integer number (9298117413).

Almost surely, 2^36503720161 is an apocalyptic number.

It is an amenable number.

36503720161 is a deficient number, since it is larger than the sum of its proper divisors (688749491).

36503720161 is an equidigital number, since it uses as much as digits as its factorization.

36503720161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 688749490.

The product of its (nonzero) digits is 22680, while the sum is 34.

The spelling of 36503720161 in words is "thirty-six billion, five hundred three million, seven hundred twenty thousand, one hundred sixty-one".