36012871661 has 4 divisors (see below), whose sum is σ = 38783092572. Its totient is φ = 33242650752.

The previous prime is 36012871651. The next prime is 36012871703. The reversal of 36012871661 is 16617821063.

36012871661 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: 16617821063 = 37 ⋅449130299.

It can be written as a sum of positive squares in 2 ways, for example, as 9546462436 + 26466409225 = 97706^2 + 162685^2 .

It is a cyclic number.

It is not a de Polignac number, because 36012871661 - 2⁶ = 36012871597 is a prime.

It is a super-3 number, since 3×36012871661³ (a number of 33 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (36012871651) 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, 1385110436 + ... + 1385110461.

It is an arithmetic number, because the mean of its divisors is an integer number (9695773143).

Almost surely, 2^36012871661 is an apocalyptic number.

It is an amenable number.

36012871661 is a deficient number, since it is larger than the sum of its proper divisors (2770220911).

36012871661 is a wasteful number, since it uses less digits than its factorization.

36012871661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2770220910.

The product of its (nonzero) digits is 72576, while the sum is 41.

The spelling of 36012871661 in words is "thirty-six billion, twelve million, eight hundred seventy-one thousand, six hundred sixty-one".