57133426636721 has 4 divisors (see below), whose sum is σ = 57133709220672. Its totient is φ = 57133144052772.

The previous prime is 57133426636717. The next prime is 57133426636733. The reversal of 57133426636721 is 12763662433175.

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 57133426636721 - 2² = 57133426636717 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (57133426636751) 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, 140988485 + ... + 141393138.

It is an arithmetic number, because the mean of its divisors is an integer number (14283427305168).

Almost surely, 2^{57133426636721} is an apocalyptic number.

It is an amenable number.

57133426636721 is a deficient number, since it is larger than the sum of its proper divisors (282583951).

57133426636721 is a wasteful number, since it uses less digits than its factorization.

57133426636721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 282583950.

The product of its digits is 22861440, while the sum is 56.

The spelling of 57133426636721 in words is "fifty-seven trillion, one hundred thirty-three billion, four hundred twenty-six million, six hundred thirty-six thousand, seven hundred twenty-one".