220246042640 has 80 divisors (see below), whose sum is σ = 555163686000. Its totient is φ = 80775776256.

The previous prime is 220246042609. The next prime is 220246042649. The reversal of 220246042640 is 46240642022.

220246042640 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 8 ways, for example, as 42256558096 + 177989484544 = 205564^2 + 421888^2 .

It is a tau number, because it is divible by the number of its divisors (80).

It is a junction number, because it is equal to n+sod(n) for n = 220246042597 and 220246042606.

It is not an unprimeable number, because it can be changed into a prime (220246042649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 555695 + ... + 865614.

It is an arithmetic number, because the mean of its divisors is an integer number (6939546075).

Almost surely, 2^220246042640 is an apocalyptic number.

220246042640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

220246042640 is an abundant number, since it is smaller than the sum of its proper divisors (334917643360).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

220246042640 is a wasteful number, since it uses less digits than its factorization.

220246042640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1421484 (or 1421478 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 32.

Adding to 220246042640 its reverse (46240642022), we get a palindrome (266486684662).

The spelling of 220246042640 in words is "two hundred twenty billion, two hundred forty-six million, forty-two thousand, six hundred forty".