6542904077 has 4 divisors (see below), whose sum is σ = 6543068700. Its totient is φ = 6542739456.

The previous prime is 6542904073. The next prime is 6542904091. The reversal of 6542904077 is 7704092456.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 4142981956 + 2399922121 = 64366^2 + 48989^2 .

It is a cyclic number.

It is not a de Polignac number, because 6542904077 - 2² = 6542904073 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6542904073) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18299 + ... + 115847.

It is an arithmetic number, because the mean of its divisors is an integer number (1635767175).

Almost surely, 2^6542904077 is an apocalyptic number.

It is an amenable number.

6542904077 is a deficient number, since it is larger than the sum of its proper divisors (164623).

6542904077 is an equidigital number, since it uses as much as digits as its factorization.

6542904077 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164622.

The product of its (nonzero) digits is 423360, while the sum is 44.

The square root of 6542904077 is about 80888.2196429122. The cubic root of 6542904077 is about 1870.3527294624.

The spelling of 6542904077 in words is "six billion, five hundred forty-two million, nine hundred four thousand, seventy-seven".