37640455665 has 16 divisors (see below), whose sum is σ = 60227841600. Its totient is φ = 20073872192.

The previous prime is 37640455661. The next prime is 37640455703. The reversal of 37640455665 is 56655404673.

37640455665 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 37640455665 - 2² = 37640455661 is a prime.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (37640455661) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 302026 + ... + 408044.

It is an arithmetic number, because the mean of its divisors is an integer number (3764240100).

Almost surely, 2^37640455665 is an apocalyptic number.

It is an amenable number.

37640455665 is a deficient number, since it is larger than the sum of its proper divisors (22587385935).

37640455665 is a wasteful number, since it uses less digits than its factorization.

37640455665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129696.

The product of its (nonzero) digits is 9072000, while the sum is 51.

The spelling of 37640455665 in words is "thirty-seven billion, six hundred forty million, four hundred fifty-five thousand, six hundred sixty-five".