1645065546044 has 12 divisors (see below), whose sum is σ = 3048209688384. Its totient is φ = 774148492224.

The previous prime is 1645065546041. The next prime is 1645065546067. The reversal of 1645065546044 is 4406455605461.

It is a junction number, because it is equal to n+sod(n) for n = 1645065545983 and 1645065546001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1645065546041) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12096070124 + ... + 12096070259.

It is an arithmetic number, because the mean of its divisors is an integer number (254017474032).

Almost surely, 2^{1645065546044} is an apocalyptic number.

It is an amenable number.

1645065546044 is a deficient number, since it is larger than the sum of its proper divisors (1403144142340).

1645065546044 is a wasteful number, since it uses less digits than its factorization.

1645065546044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24192140404 (or 24192140402 counting only the distinct ones).

The product of its (nonzero) digits is 6912000, while the sum is 50.

The spelling of 1645065546044 in words is "one trillion, six hundred forty-five billion, sixty-five million, five hundred forty-six thousand, forty-four".