641162471 has 4 divisors (see below), whose sum is σ = 641403600. Its totient is φ = 640921344.

The previous prime is 641162449. The next prime is 641162507. The reversal of 641162471 is 174261146.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 641162471 - 2⁶ = 641162407 is a prime.

It is a super-3 number, since 3×641162471³ (a number of 27 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (641162411) 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, 116531 + ... + 121908.

It is an arithmetic number, because the mean of its divisors is an integer number (160350900).

Almost surely, 2^641162471 is an apocalyptic number.

641162471 is a deficient number, since it is larger than the sum of its proper divisors (241129).

641162471 is a wasteful number, since it uses less digits than its factorization.

641162471 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 241128.

The product of its digits is 8064, while the sum is 32.

The square root of 641162471 is about 25321.1862083908. The cubic root of 641162471 is about 862.2953245623.

The spelling of 641162471 in words is "six hundred forty-one million, one hundred sixty-two thousand, four hundred seventy-one".