57742321281 has 4 divisors (see below), whose sum is σ = 76989761712. Its totient is φ = 38494880852.

The previous prime is 57742321277. The next prime is 57742321327. The reversal of 57742321281 is 18212324775.

It is a happy number.

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 57742321281 - 2² = 57742321277 is a prime.

It is a super-2 number, since 2×57742321281² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (57742320281) 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, 9623720211 + ... + 9623720216.

It is an arithmetic number, because the mean of its divisors is an integer number (19247440428).

Almost surely, 2^57742321281 is an apocalyptic number.

It is an amenable number.

57742321281 is a deficient number, since it is larger than the sum of its proper divisors (19247440431).

57742321281 is a wasteful number, since it uses less digits than its factorization.

57742321281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19247440430.

The product of its digits is 188160, while the sum is 42.

The spelling of 57742321281 in words is "fifty-seven billion, seven hundred forty-two million, three hundred twenty-one thousand, two hundred eighty-one".