3440420065657 has 4 divisors (see below), whose sum is σ = 3642797716596. Its totient is φ = 3238042414720.

The previous prime is 3440420065639. The next prime is 3440420065717. The reversal of 3440420065657 is 7565600240443.

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 2757555826921 + 682864238736 = 1660589^2 + 826356^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3440420065657 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3440420065627) 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, 101188825444 + ... + 101188825477.

It is an arithmetic number, because the mean of its divisors is an integer number (910699429149).

Almost surely, 2^{3440420065657} is an apocalyptic number.

It is an amenable number.

3440420065657 is a deficient number, since it is larger than the sum of its proper divisors (202377650939).

3440420065657 is a wasteful number, since it uses less digits than its factorization.

3440420065657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 202377650938.

The product of its (nonzero) digits is 2419200, while the sum is 46.

The spelling of 3440420065657 in words is "three trillion, four hundred forty billion, four hundred twenty million, sixty-five thousand, six hundred fifty-seven".