1801971433648 has 20 divisors (see below), whose sum is σ = 3491428371088. Its totient is φ = 900957660480.

The previous prime is 1801971433621. The next prime is 1801971433699. The reversal of 1801971433648 is 8463341791081.

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, 1218708 + ... + 2255923.

Almost surely, 2^{1801971433648} is an apocalyptic number.

It is an amenable number.

1801971433648 is a deficient number, since it is larger than the sum of its proper divisors (1689456937440).

1801971433648 is a wasteful number, since it uses less digits than its factorization.

1801971433648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3507052 (or 3507046 counting only the distinct ones).

The product of its (nonzero) digits is 3483648, while the sum is 55.

The spelling of 1801971433648 in words is "one trillion, eight hundred one billion, nine hundred seventy-one million, four hundred thirty-three thousand, six hundred forty-eight".