6541439818057 has 4 divisors (see below), whose sum is σ = 6652311679440. Its totient is φ = 6430567956676.

The previous prime is 6541439818031. The next prime is 6541439818087. The reversal of 6541439818057 is 7508189341456.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 6541439818057 - 2¹⁵ = 6541439785289 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6541439817986 and 6541439818004.

It is not an unprimeable number, because it can be changed into a prime (6541439818007) 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, 55435930603 + ... + 55435930720.

It is an arithmetic number, because the mean of its divisors is an integer number (1663077919860).

Almost surely, 2^{6541439818057} is an apocalyptic number.

It is an amenable number.

6541439818057 is a deficient number, since it is larger than the sum of its proper divisors (110871861383).

6541439818057 is a wasteful number, since it uses less digits than its factorization.

6541439818057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110871861382.

The product of its (nonzero) digits is 29030400, while the sum is 61.

The spelling of 6541439818057 in words is "six trillion, five hundred forty-one billion, four hundred thirty-nine million, eight hundred eighteen thousand, fifty-seven".