1947215831164 has 48 divisors (see below), whose sum is σ = 3490792145568. Its totient is φ = 950133362688.

The previous prime is 1947215831153. The next prime is 1947215831167. The reversal of 1947215831164 is 4611385127491.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1947215831167) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 178917267 + ... + 178928149.

It is an arithmetic number, because the mean of its divisors is an integer number (72724836366).

Almost surely, 2^{1947215831164} is an apocalyptic number.

It is an amenable number.

1947215831164 is a deficient number, since it is larger than the sum of its proper divisors (1543576314404).

1947215831164 is a wasteful number, since it uses less digits than its factorization.

1947215831164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17374 (or 17372 counting only the distinct ones).

The product of its digits is 1451520, while the sum is 52.

The spelling of 1947215831164 in words is "one trillion, nine hundred forty-seven billion, two hundred fifteen million, eight hundred thirty-one thousand, one hundred sixty-four".