36561101777 has 4 divisors (see below), whose sum is σ = 37250933940. Its totient is φ = 35871269616.

The previous prime is 36561101743. The next prime is 36561101813. The reversal of 36561101777 is 77710116563.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 77710116563 = 193 ⋅402643091.

It can be written as a sum of positive squares in 2 ways, for example, as 18878485201 + 17682616576 = 137399^2 + 132976^2 .

It is a cyclic number.

It is not a de Polignac number, because 36561101777 - 2¹⁶ = 36561036241 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (36561107777) 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, 344916002 + ... + 344916107.

It is an arithmetic number, because the mean of its divisors is an integer number (9312733485).

Almost surely, 2^36561101777 is an apocalyptic number.

It is an amenable number.

36561101777 is a deficient number, since it is larger than the sum of its proper divisors (689832163).

36561101777 is an equidigital number, since it uses as much as digits as its factorization.

36561101777 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 689832162.

The product of its (nonzero) digits is 185220, while the sum is 44.

The spelling of 36561101777 in words is "thirty-six billion, five hundred sixty-one million, one hundred one thousand, seven hundred seventy-seven".