1947831645218 has 32 divisors (see below), whose sum is σ = 3080497029120. Its totient is φ = 922347337680.

The previous prime is 1947831645191. The next prime is 1947831645233. The reversal of 1947831645218 is 8125461387491.

It is a happy number.

It is a super-2 number, since 2×1947831645218² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32195705 + ... + 32256147.

It is an arithmetic number, because the mean of its divisors is an integer number (96265532160).

Almost surely, 2^{1947831645218} is an apocalyptic number.

1947831645218 is a deficient number, since it is larger than the sum of its proper divisors (1132665383902).

1947831645218 is a wasteful number, since it uses less digits than its factorization.

1947831645218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71582.

The product of its digits is 11612160, while the sum is 59.

The spelling of 1947831645218 in words is "one trillion, nine hundred forty-seven billion, eight hundred thirty-one million, six hundred forty-five thousand, two hundred eighteen".