641585145 has 16 divisors (see below), whose sum is σ = 1059651072. Its totient is φ = 331140480.

The previous prime is 641585137. The next prime is 641585167. The reversal of 641585145 is 541585146.

It is not a de Polignac number, because 641585145 - 2³ = 641585137 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 689412 + ... + 690341.

It is an arithmetic number, because the mean of its divisors is an integer number (66228192).

Almost surely, 2^641585145 is an apocalyptic number.

It is an amenable number.

641585145 is a deficient number, since it is larger than the sum of its proper divisors (418065927).

641585145 is a wasteful number, since it uses less digits than its factorization.

641585145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1379792.

The product of its digits is 96000, while the sum is 39.

The square root of 641585145 is about 25329.5310852767. The cubic root of 641585145 is about 862.4847667967.

Subtracting from 641585145 its reverse (541585146), we obtain a palindrome (99999999).

The spelling of 641585145 in words is "six hundred forty-one million, five hundred eighty-five thousand, one hundred forty-five".