641468431 has 4 divisors (see below), whose sum is σ = 641562592. Its totient is φ = 641374272.

The previous prime is 641468419. The next prime is 641468437. The reversal of 641468431 is 134864146.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 134864146 = 2 ⋅67432073.

It is a cyclic number.

It is not a de Polignac number, because 641468431 - 2¹¹ = 641466383 is a prime.

It is a super-2 number, since 2×641468431² = 822963495939203522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (641468437) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35991 + ... + 50776.

It is an arithmetic number, because the mean of its divisors is an integer number (160390648).

Almost surely, 2^641468431 is an apocalyptic number.

641468431 is a deficient number, since it is larger than the sum of its proper divisors (94161).

641468431 is an equidigital number, since it uses as much as digits as its factorization.

641468431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94160.

The product of its digits is 55296, while the sum is 37.

The square root of 641468431 is about 25327.2270689075. The cubic root of 641468431 is about 862.4324639690.

The spelling of 641468431 in words is "six hundred forty-one million, four hundred sixty-eight thousand, four hundred thirty-one".