641472819 has 16 divisors (see below), whose sum is σ = 923748000. Its totient is φ = 393613056.

The previous prime is 641472817. The next prime is 641472847. The reversal of 641472819 is 918274146.

It is not a de Polignac number, because 641472819 - 2¹ = 641472817 is a prime.

It is a super-2 number, since 2×641472819² = 822974755031613522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (641472817) 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, 9954 + ... + 37175.

It is an arithmetic number, because the mean of its divisors is an integer number (57734250).

Almost surely, 2^641472819 is an apocalyptic number.

641472819 is a deficient number, since it is larger than the sum of its proper divisors (282275181).

641472819 is a wasteful number, since it uses less digits than its factorization.

641472819 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47494.

The product of its digits is 96768, while the sum is 42.

The square root of 641472819 is about 25327.3136949026. The cubic root of 641472819 is about 862.4344304701.

It can be divided in two parts, 64147 and 2819, that added together give a palindrome (66966).

The spelling of 641472819 in words is "six hundred forty-one million, four hundred seventy-two thousand, eight hundred nineteen".