3147745665520 has 40 divisors (see below), whose sum is σ = 7320667518720. Its totient is φ = 1258726851840.

The previous prime is 3147745665511. The next prime is 3147745665527. The reversal of 3147745665520 is 255665477413.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3147745665527) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 5530375 + ... + 6072934.

It is an arithmetic number, because the mean of its divisors is an integer number (183016687968).

Almost surely, 2^{3147745665520} is an apocalyptic number.

It is an amenable number.

3147745665520 is an abundant number, since it is smaller than the sum of its proper divisors (4172921853200).

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

3147745665520 is a wasteful number, since it uses less digits than its factorization.

3147745665520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11606713 (or 11606707 counting only the distinct ones).

The product of its (nonzero) digits is 21168000, while the sum is 55.

The spelling of 3147745665520 in words is "three trillion, one hundred forty-seven billion, seven hundred forty-five million, six hundred sixty-five thousand, five hundred twenty".