647363131394 has 8 divisors (see below), whose sum is σ = 1109765368128. Its totient is φ = 277441342020.

The previous prime is 647363131381. The next prime is 647363131399. The reversal of 647363131394 is 493131363746.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (647363131399) 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 3 ways as a sum of consecutive naturals, for example, 23120111822 + ... + 23120111849.

It is an arithmetic number, because the mean of its divisors is an integer number (138720671016).

Almost surely, 2^647363131394 is an apocalyptic number.

647363131394 is a deficient number, since it is larger than the sum of its proper divisors (462402236734).

647363131394 is a wasteful number, since it uses less digits than its factorization.

647363131394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46240223680.

The product of its digits is 2939328, while the sum is 50.

The spelling of 647363131394 in words is "six hundred forty-seven billion, three hundred sixty-three million, one hundred thirty-one thousand, three hundred ninety-four".