6542978210 has 8 divisors (see below), whose sum is σ = 11777360796. Its totient is φ = 2617191280.

The previous prime is 6542978137. The next prime is 6542978251. The reversal of 6542978210 is 128792456.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 6542706769 + 271441 = 80887^2 + 521^2 .

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

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 327148901 + ... + 327148920.

Almost surely, 2^6542978210 is an apocalyptic number.

6542978210 is a deficient number, since it is larger than the sum of its proper divisors (5234382586).

6542978210 is a wasteful number, since it uses less digits than its factorization.

6542978210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 654297828.

The product of its (nonzero) digits is 241920, while the sum is 44.

The square root of 6542978210 is about 80888.6778851033. The cubic root of 6542978210 is about 1870.3597933152.

The spelling of 6542978210 in words is "six billion, five hundred forty-two million, nine hundred seventy-eight thousand, two hundred ten".