6561340487354 has 16 divisors (see below), whose sum is σ = 9894602664960. Its totient is φ = 3263158301760.

The previous prime is 6561340487327. The next prime is 6561340487357. The reversal of 6561340487354 is 4537840431656.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 6561340487354.

It is not an unprimeable number, because it can be changed into a prime (6561340487357) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3972959 + ... + 5376530.

It is an arithmetic number, because the mean of its divisors is an integer number (618412666560).

Almost surely, 2^{6561340487354} is an apocalyptic number.

6561340487354 is a deficient number, since it is larger than the sum of its proper divisors (3333262177606).

6561340487354 is a wasteful number, since it uses less digits than its factorization.

6561340487354 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9351365.

The product of its (nonzero) digits is 29030400, while the sum is 56.

The spelling of 6561340487354 in words is "six trillion, five hundred sixty-one billion, three hundred forty million, four hundred eighty-seven thousand, three hundred fifty-four".