36642446635661 has 32 divisors (see below), whose sum is σ = 38826139968000. Its totient is φ = 34524666150912.

The previous prime is 36642446635607. The next prime is 36642446635703. The reversal of 36642446635661 is 16653664424663.

It is a cyclic number.

It is not a de Polignac number, because 36642446635661 - 2³⁰ = 36641372893837 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 36642446635594 and 36642446635603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (36642446632661) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 648774755 + ... + 648831231.

It is an arithmetic number, because the mean of its divisors is an integer number (1213316874000).

Almost surely, 2^{36642446635661} is an apocalyptic number.

It is an amenable number.

36642446635661 is a deficient number, since it is larger than the sum of its proper divisors (2183693332339).

36642446635661 is a wasteful number, since it uses less digits than its factorization.

36642446635661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57941.

The product of its digits is 268738560, while the sum is 62.

The spelling of 36642446635661 in words is "thirty-six trillion, six hundred forty-two billion, four hundred forty-six million, six hundred thirty-five thousand, six hundred sixty-one".