641142549 has 48 divisors (see below), whose sum is σ = 1003871232. Its totient is φ = 393237504.

The previous prime is 641142533. The next prime is 641142553. The reversal of 641142549 is 945241146.

641142549 is a `hidden beast` number, since 64 + 11 + 42 + 549 = 666.

641142549 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 641142549 - 2⁴ = 641142533 is a prime.

It is a super-2 number, since 2×641142549² = 822127536276434802, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (641142149) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 742492 + ... + 743354.

It is an arithmetic number, because the mean of its divisors is an integer number (20913984).

Almost surely, 2^641142549 is an apocalyptic number.

641142549 is a gapful number since it is divisible by the number (69) formed by its first and last digit.

It is an amenable number.

641142549 is a deficient number, since it is larger than the sum of its proper divisors (362728683).

641142549 is a wasteful number, since it uses less digits than its factorization.

641142549 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1026 (or 1023 counting only the distinct ones).

The product of its digits is 34560, while the sum is 36.

The square root of 641142549 is about 25320.7928193412. The cubic root of 641142549 is about 862.2863934794.

The spelling of 641142549 in words is "six hundred forty-one million, one hundred forty-two thousand, five hundred forty-nine".