641172473 has 12 divisors (see below), whose sum is σ = 678723444. Its totient is φ = 605318400.

The previous prime is 641172463. The next prime is 641172481. The reversal of 641172473 is 374271146.

It can be written as a sum of positive squares in 2 ways, for example, as 331130809 + 310041664 = 18197^2 + 17608^2 .

It is not a de Polignac number, because 641172473 - 2¹⁰ = 641171449 is a prime.

It is a super-2 number, since 2×641172473² = 822204280265871458, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (641172463) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 31265 + ... + 47537.

It is an arithmetic number, because the mean of its divisors is an integer number (56560287).

Almost surely, 2^641172473 is an apocalyptic number.

It is an amenable number.

641172473 is a deficient number, since it is larger than the sum of its proper divisors (37550971).

641172473 is a wasteful number, since it uses less digits than its factorization.

641172473 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16376 (or 16345 counting only the distinct ones).

The product of its digits is 28224, while the sum is 35.

The square root of 641172473 is about 25321.3837102162. The cubic root of 641172473 is about 862.2998084143.

The spelling of 641172473 in words is "six hundred forty-one million, one hundred seventy-two thousand, four hundred seventy-three".