57242661361 has 4 divisors (see below), whose sum is σ = 57243207924. Its totient is φ = 57242114800.

The previous prime is 57242661269. The next prime is 57242661403. The reversal of 57242661361 is 16316624275.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 29983000336 + 27259661025 = 173156^2 + 165105^2 .

It is a cyclic number.

It is not a de Polignac number, because 57242661361 - 2⁷ = 57242661233 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (57242661061) 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, 61450 + ... + 343891.

It is an arithmetic number, because the mean of its divisors is an integer number (14310801981).

Almost surely, 2^57242661361 is an apocalyptic number.

It is an amenable number.

57242661361 is a deficient number, since it is larger than the sum of its proper divisors (546563).

57242661361 is a wasteful number, since it uses less digits than its factorization.

57242661361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 546562.

The product of its digits is 362880, while the sum is 43.

The spelling of 57242661361 in words is "fifty-seven billion, two hundred forty-two million, six hundred sixty-one thousand, three hundred sixty-one".