3640946081896 has 8 divisors (see below), whose sum is σ = 6826773903570. Its totient is φ = 1820473040944.

The previous prime is 3640946081887. The next prime is 3640946081909. The reversal of 3640946081896 is 6981806490463.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1952687632996 + 1688258448900 = 1397386^2 + 1299330^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 227559130111 + ... + 227559130126.

Almost surely, 2^{3640946081896} is an apocalyptic number.

It is an amenable number.

3640946081896 is a deficient number, since it is larger than the sum of its proper divisors (3185827821674).

3640946081896 is a wasteful number, since it uses less digits than its factorization.

3640946081896 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 455118260243 (or 455118260239 counting only the distinct ones).

The product of its (nonzero) digits is 53747712, while the sum is 64.

The spelling of 3640946081896 in words is "three trillion, six hundred forty billion, nine hundred forty-six million, eighty-one thousand, eight hundred ninety-six".