641130278 has 8 divisors (see below), whose sum is σ = 962138568. Its totient is φ = 320417424.

The previous prime is 641130277. The next prime is 641130293. The reversal of 641130278 is 872031146.

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

It is a super-2 number, since 2×641130278² = 822096066736714568, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (641130277) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 68351 + ... + 77162.

It is an arithmetic number, because the mean of its divisors is an integer number (120267321).

Almost surely, 2^641130278 is an apocalyptic number.

641130278 is a deficient number, since it is larger than the sum of its proper divisors (321008290).

641130278 is a wasteful number, since it uses less digits than its factorization.

641130278 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147718.

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

The square root of 641130278 is about 25320.5505074436. The cubic root of 641130278 is about 862.2808922671.

The spelling of 641130278 in words is "six hundred forty-one million, one hundred thirty thousand, two hundred seventy-eight".