6539742077 has 8 divisors (see below), whose sum is σ = 7140288672. Its totient is φ = 5940199600.

The previous prime is 6539742061. The next prime is 6539742089. The reversal of 6539742077 is 7702479356.

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

It is a cyclic number.

It is not a de Polignac number, because 6539742077 - 2⁴ = 6539742061 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6539742047) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 237374 + ... + 263487.

It is an arithmetic number, because the mean of its divisors is an integer number (892536084).

Almost surely, 2^6539742077 is an apocalyptic number.

It is an amenable number.

6539742077 is a deficient number, since it is larger than the sum of its proper divisors (600546595).

6539742077 is a wasteful number, since it uses less digits than its factorization.

6539742077 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 502059.

The product of its (nonzero) digits is 2222640, while the sum is 50.

The square root of 6539742077 is about 80868.6717895132. The cubic root of 6539742077 is about 1870.0513847682.

The spelling of 6539742077 in words is "six billion, five hundred thirty-nine million, seven hundred forty-two thousand, seventy-seven".