36645961 has 4 divisors (see below), whose sum is σ = 39977424. Its totient is φ = 33314500.

The previous prime is 36645941. The next prime is 36645997. The reversal of 36645961 is 16954663.

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: 16954663 = 11 ⋅1541333.

It is a cyclic number.

It is not a de Polignac number, because 36645961 - 2⁵ = 36645929 is a prime.

It is a super-2 number, since 2×36645961² = 2685852915227042, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (36645901) 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, 1665715 + ... + 1665736.

It is an arithmetic number, because the mean of its divisors is an integer number (9994356).

Almost surely, 2^36645961 is an apocalyptic number.

It is an amenable number.

36645961 is a deficient number, since it is larger than the sum of its proper divisors (3331463).

36645961 is a wasteful number, since it uses less digits than its factorization.

36645961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3331462.

The product of its digits is 116640, while the sum is 40.

The square root of 36645961 is about 6053.5907526030. The cubic root of 36645961 is about 332.1559514342.

The spelling of 36645961 in words is "thirty-six million, six hundred forty-five thousand, nine hundred sixty-one".