42756544486657 has 4 divisors (see below), whose sum is σ = 42756711676420. Its totient is φ = 42756377296896.

The previous prime is 42756544486631. The next prime is 42756544486661. The reversal of 42756544486657 is 75668444565724.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 35794841128641 + 6961703358016 = 5982879^2 + 2638504^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42756544486657 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 42756544486657.

It is not an unprimeable number, because it can be changed into a prime (42756544486627) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 83210688 + ... + 83722945.

It is an arithmetic number, because the mean of its divisors is an integer number (10689177919105).

Almost surely, 2^{42756544486657} is an apocalyptic number.

It is an amenable number.

42756544486657 is a deficient number, since it is larger than the sum of its proper divisors (167189763).

42756544486657 is a wasteful number, since it uses less digits than its factorization.

42756544486657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 167189762.

The product of its digits is 5419008000, while the sum is 73.

The spelling of 42756544486657 in words is "forty-two trillion, seven hundred fifty-six billion, five hundred forty-four million, four hundred eighty-six thousand, six hundred fifty-seven".