6509438377542 has 24 divisors (see below), whose sum is σ = 14126790978144. Its totient is φ = 2166273126864.

The previous prime is 6509438377513. The next prime is 6509438377543. The reversal of 6509438377542 is 2457738349056.

It is a happy number.

6509438377542 is a `hidden beast` number, since 6 + 5 + 0 + 9 + 4 + 3 + 83 + 7 + 7 + 542 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 6509438377542.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6509438377543) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 294960798 + ... + 294982865.

It is an arithmetic number, because the mean of its divisors is an integer number (588616290756).

Almost surely, 2^{6509438377542} is an apocalyptic number.

6509438377542 is an abundant number, since it is smaller than the sum of its proper divisors (7617352600602).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6509438377542 is a wasteful number, since it uses less digits than its factorization.

6509438377542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 589944284 (or 589944281 counting only the distinct ones).

The product of its (nonzero) digits is 152409600, while the sum is 63.

The spelling of 6509438377542 in words is "six trillion, five hundred nine billion, four hundred thirty-eight million, three hundred seventy-seven thousand, five hundred forty-two".