6540220456 has 32 divisors (see below), whose sum is σ = 15288828480. Its totient is φ = 2548137600.

The previous prime is 6540220439. The next prime is 6540220481.

6540220456 is nontrivially palindromic in base 10.

It is a super-2 number, since 2×6540220456² = 85548967226161695872, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5308005 + ... + 5309236.

It is an arithmetic number, because the mean of its divisors is an integer number (477775890).

Almost surely, 2^6540220456 is an apocalyptic number.

It is an amenable number.

6540220456 is an abundant number, since it is smaller than the sum of its proper divisors (8748608024).

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

6540220456 is a wasteful number, since it uses less digits than its factorization.

6540220456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10617265 (or 10617261 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 34.

The square root of 6540220456 is about 80871.6294877258. The cubic root of 6540220456 is about 1870.0969814440.

It can be divided in two parts, 65402 and 20456, that added together give a palindrome (85858).

The spelling of 6540220456 in words is "six billion, five hundred forty million, two hundred twenty thousand, four hundred fifty-six".