6542378026 has 4 divisors (see below), whose sum is σ = 9813567042. Its totient is φ = 3271189012.

The previous prime is 6542378023. The next prime is 6542378071. The reversal of 6542378026 is 6208732456.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 6464320801 + 78057225 = 80401^2 + 8835^2 .

It is not an unprimeable number, because it can be changed into a prime (6542378023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1635594505 + ... + 1635594508.

Almost surely, 2^6542378026 is an apocalyptic number.

6542378026 is a deficient number, since it is larger than the sum of its proper divisors (3271189016).

6542378026 is a wasteful number, since it uses less digits than its factorization.

6542378026 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3271189015.

The product of its (nonzero) digits is 483840, while the sum is 43.

The square root of 6542378026 is about 80884.9678617727. The cubic root of 6542378026 is about 1870.3026025217.

The spelling of 6542378026 in words is "six billion, five hundred forty-two million, three hundred seventy-eight thousand, twenty-six".