3640404556545 has 32 divisors (see below), whose sum is σ = 6025810752000. Its totient is φ = 1874501577984.

The previous prime is 3640404556511. The next prime is 3640404556553. The reversal of 3640404556545 is 5456554040463.

It is not a de Polignac number, because 3640404556545 - 2⁷ = 3640404556417 is a prime.

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 in 31 ways as a sum of consecutive naturals, for example, 8557144 + ... + 8972486.

It is an arithmetic number, because the mean of its divisors is an integer number (188306586000).

Almost surely, 2^{3640404556545} is an apocalyptic number.

It is an amenable number.

3640404556545 is a deficient number, since it is larger than the sum of its proper divisors (2385406195455).

3640404556545 is a wasteful number, since it uses less digits than its factorization.

3640404556545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 435529.

The product of its (nonzero) digits is 17280000, while the sum is 51.

The spelling of 3640404556545 in words is "three trillion, six hundred forty billion, four hundred four million, five hundred fifty-six thousand, five hundred forty-five".