36511456661 has 4 divisors (see below), whose sum is σ = 36512552352. Its totient is φ = 36510360972.

The previous prime is 36511456643. The next prime is 36511456673. The reversal of 36511456661 is 16665411563.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 16665411563 = 45343 ⋅367541.

It is a cyclic number.

It is not a de Polignac number, because 36511456661 - 2¹⁰ = 36511455637 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (36511456601) 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, 496241 + ... + 565046.

It is an arithmetic number, because the mean of its divisors is an integer number (9128138088).

Almost surely, 2^36511456661 is an apocalyptic number.

It is an amenable number.

36511456661 is a deficient number, since it is larger than the sum of its proper divisors (1095691).

36511456661 is a wasteful number, since it uses less digits than its factorization.

36511456661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1095690.

The product of its digits is 388800, while the sum is 44.

The spelling of 36511456661 in words is "thirty-six billion, five hundred eleven million, four hundred fifty-six thousand, six hundred sixty-one".