641742567 has 8 divisors (see below), whose sum is σ = 861813120. Its totient is φ = 424750200.

The previous prime is 641742547. The next prime is 641742581. The reversal of 641742567 is 765247146.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 641742567 - 2¹⁶ = 641677031 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (641742547) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 769059 + ... + 769892.

It is an arithmetic number, because the mean of its divisors is an integer number (107726640).

Almost surely, 2^641742567 is an apocalyptic number.

641742567 is a deficient number, since it is larger than the sum of its proper divisors (220070553).

641742567 is a wasteful number, since it uses less digits than its factorization.

641742567 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1539093.

The product of its digits is 282240, while the sum is 42.

The square root of 641742567 is about 25332.6383742397. The cubic root of 641742567 is about 862.5553019781. Note that the first 3 decimals are identical.

It can be divided in two parts, 6417 and 42567, that added together give a palindrome (48984).

The spelling of 641742567 in words is "six hundred forty-one million, seven hundred forty-two thousand, five hundred sixty-seven".