1947745579648 has 32 divisors (see below), whose sum is σ = 4233026617920. Its totient is φ = 885338899200.

The previous prime is 1947745579589. The next prime is 1947745579667. The reversal of 1947745579648 is 8469755477491.

It is a tau number, because it is divible by the number of its divisors (32).

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, 691669608 + ... + 691672423.

It is an arithmetic number, because the mean of its divisors is an integer number (132282081810).

Almost surely, 2^{1947745579648} is an apocalyptic number.

It is an amenable number.

1947745579648 is an abundant number, since it is smaller than the sum of its proper divisors (2285281038272).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1947745579648 is a wasteful number, since it uses less digits than its factorization.

1947745579648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1383342056 (or 1383342044 counting only the distinct ones).

The product of its digits is 2133734400, while the sum is 76.

The spelling of 1947745579648 in words is "one trillion, nine hundred forty-seven billion, seven hundred forty-five million, five hundred seventy-nine thousand, six hundred forty-eight".