36649494664 has 32 divisors (see below), whose sum is σ = 69407415000. Its totient is φ = 18141138432.

The previous prime is 36649494617. The next prime is 36649494667. The reversal of 36649494664 is 46649494663.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 19368288900 + 17281205764 = 139170^2 + 131458^2 .

It is not an unprimeable number, because it can be changed into a prime (36649494667) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1040412 + ... + 1075060.

Almost surely, 2^36649494664 is an apocalyptic number.

It is an amenable number.

36649494664 is a deficient number, since it is larger than the sum of its proper divisors (32757920336).

36649494664 is a wasteful number, since it uses less digits than its factorization.

36649494664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35977 (or 35973 counting only the distinct ones).

The product of its digits is 80621568, while the sum is 61.

Subtracting 36649494664 from its reverse (46649494663), we obtain a palindrome (9999999999).

The spelling of 36649494664 in words is "thirty-six billion, six hundred forty-nine million, four hundred ninety-four thousand, six hundred sixty-four".