1645356543448 has 16 divisors (see below), whose sum is σ = 3085513683480. Its totient is φ = 822552894528.

The previous prime is 1645356543431. The next prime is 1645356543533. The reversal of 1645356543448 is 8443456535461.

It is a junction number, because it is equal to n+sod(n) for n = 1645356543392 and 1645356543401.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15616365 + ... + 15721372.

Almost surely, 2^{1645356543448} is an apocalyptic number.

It is an amenable number.

1645356543448 is a deficient number, since it is larger than the sum of its proper divisors (1440157140032).

1645356543448 is a wasteful number, since it uses less digits than its factorization.

1645356543448 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31344306 (or 31344302 counting only the distinct ones).

The product of its digits is 82944000, while the sum is 58.

The spelling of 1645356543448 in words is "one trillion, six hundred forty-five billion, three hundred fifty-six million, five hundred forty-three thousand, four hundred forty-eight".