57144045521 has 4 divisors (see below), whose sum is σ = 57147213312. Its totient is φ = 57140877732.

The previous prime is 57144045493. The next prime is 57144045533. The reversal of 57144045521 is 12554044175.

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 57144045521 - 2³⁰ = 56070303697 is a prime.

It is a super-2 number, since 2×57144045521² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (57144042521) 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, 1556681 + ... + 1592966.

It is an arithmetic number, because the mean of its divisors is an integer number (14286803328).

Almost surely, 2^57144045521 is an apocalyptic number.

It is an amenable number.

57144045521 is a deficient number, since it is larger than the sum of its proper divisors (3167791).

57144045521 is a wasteful number, since it uses less digits than its factorization.

57144045521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3167790.

The product of its (nonzero) digits is 112000, while the sum is 38.

Adding to 57144045521 its reverse (12554044175), we get a palindrome (69698089696).

The spelling of 57144045521 in words is "fifty-seven billion, one hundred forty-four million, forty-five thousand, five hundred twenty-one".