3640662961945 has 16 divisors (see below), whose sum is σ = 4374448763328. Its totient is φ = 2908762108480.

The previous prime is 3640662961939. The next prime is 3640662961963. The reversal of 3640662961945 is 5491692660463.

3640662961945 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 3640662961945 - 2⁹ = 3640662961433 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 73811982 + ... + 73861288.

It is an arithmetic number, because the mean of its divisors is an integer number (273403047708).

Almost surely, 2^{3640662961945} is an apocalyptic number.

It is an amenable number.

3640662961945 is a deficient number, since it is larger than the sum of its proper divisors (733785801383).

3640662961945 is a wasteful number, since it uses less digits than its factorization.

3640662961945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68120.

The product of its (nonzero) digits is 50388480, while the sum is 61.

The spelling of 3640662961945 in words is "three trillion, six hundred forty billion, six hundred sixty-two million, nine hundred sixty-one thousand, nine hundred forty-five".