641401673 has 16 divisors (see below), whose sum is σ = 714522816. Its totient is φ = 570877440.

The previous prime is 641401669. The next prime is 641401693. The reversal of 641401673 is 376104146.

It is a cyclic number.

It is not a de Polignac number, because 641401673 - 2² = 641401669 is a prime.

It is a super-2 number, since 2×641401673² = 822792212254397858, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (641401603) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 100061 + ... + 106277.

It is an arithmetic number, because the mean of its divisors is an integer number (44657676).

Almost surely, 2^641401673 is an apocalyptic number.

It is an amenable number.

641401673 is a deficient number, since it is larger than the sum of its proper divisors (73121143).

641401673 is a wasteful number, since it uses less digits than its factorization.

641401673 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6424.

The product of its (nonzero) digits is 12096, while the sum is 32.

The square root of 641401673 is about 25325.9091248468. The cubic root of 641401673 is about 862.4025449785.

The spelling of 641401673 in words is "six hundred forty-one million, four hundred one thousand, six hundred seventy-three".