6542210645 has 16 divisors (see below), whose sum is σ = 8063858880. Its totient is φ = 5093514624.

The previous prime is 6542210641. The next prime is 6542210671. The reversal of 6542210645 is 5460122456.

It is a cyclic number.

It is not a de Polignac number, because 6542210645 - 2² = 6542210641 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6542210641) 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 15 ways as a sum of consecutive naturals, for example, 89840 + ... + 145449.

It is an arithmetic number, because the mean of its divisors is an integer number (503991180).

Almost surely, 2^6542210645 is an apocalyptic number.

It is an amenable number.

6542210645 is a deficient number, since it is larger than the sum of its proper divisors (1521648235).

6542210645 is a wasteful number, since it uses less digits than its factorization.

6542210645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 235444.

The product of its (nonzero) digits is 57600, while the sum is 35.

The square root of 6542210645 is about 80883.9331696969. The cubic root of 6542210645 is about 1870.2866523688.

It can be divided in two parts, 65422 and 10645, that added together give a palindrome (76067).

The spelling of 6542210645 in words is "six billion, five hundred forty-two million, two hundred ten thousand, six hundred forty-five".