147981156644 has 6 divisors (see below), whose sum is σ = 258967024134. Its totient is φ = 73990578320.

The previous prime is 147981156641. The next prime is 147981156733. The reversal of 147981156644 is 446651189741.

It can be written as a sum of positive squares in only one way, i.e., 83128422400 + 64852734244 = 288320^2 + 254662^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 147981156644.

It is not an unprimeable number, because it can be changed into a prime (147981156641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18497644577 + ... + 18497644584.

It is an arithmetic number, because the mean of its divisors is an integer number (43161170689).

Almost surely, 2^147981156644 is an apocalyptic number.

It is an amenable number.

147981156644 is a deficient number, since it is larger than the sum of its proper divisors (110985867490).

147981156644 is a wasteful number, since it uses less digits than its factorization.

147981156644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36995289165 (or 36995289163 counting only the distinct ones).

The product of its digits is 5806080, while the sum is 56.

The spelling of 147981156644 in words is "one hundred forty-seven billion, nine hundred eighty-one million, one hundred fifty-six thousand, six hundred forty-four".