643071457474 has 32 divisors (see below), whose sum is σ = 974710396800. Its totient is φ = 318186144000.

The previous prime is 643071457471. The next prime is 643071457489. The reversal of 643071457474 is 474754170346.

It is not an unprimeable number, because it can be changed into a prime (643071457471) 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 15 ways as a sum of consecutive naturals, for example, 143444437 + ... + 143448919.

It is an arithmetic number, because the mean of its divisors is an integer number (30459699900).

Almost surely, 2^643071457474 is an apocalyptic number.

643071457474 is a deficient number, since it is larger than the sum of its proper divisors (331638939326).

643071457474 is a wasteful number, since it uses less digits than its factorization.

643071457474 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6346.

The product of its (nonzero) digits is 7902720, while the sum is 52.

The spelling of 643071457474 in words is "six hundred forty-three billion, seventy-one million, four hundred fifty-seven thousand, four hundred seventy-four".