643057725674 has 32 divisors (see below), whose sum is σ = 1207305267840. Its totient is φ = 250084654272.

The previous prime is 643057725637. The next prime is 643057725677. The reversal of 643057725674 is 476527750346.

643057725674 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (643057725677) 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, 29932349 + ... + 29953824.

It is an arithmetic number, because the mean of its divisors is an integer number (37728289620).

Almost surely, 2^643057725674 is an apocalyptic number.

643057725674 is a deficient number, since it is larger than the sum of its proper divisors (564247542166).

643057725674 is a wasteful number, since it uses less digits than its factorization.

643057725674 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59886254.

The product of its (nonzero) digits is 29635200, while the sum is 56.

The spelling of 643057725674 in words is "six hundred forty-three billion, fifty-seven million, seven hundred twenty-five thousand, six hundred seventy-four".