57361051821 has 4 divisors (see below), whose sum is σ = 76481402432. Its totient is φ = 38240701212.

The previous prime is 57361051801. The next prime is 57361051831. The reversal of 57361051821 is 12815016375.

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 not a de Polignac number, because 57361051821 - 2⁹ = 57361051309 is a prime.

It is a super-2 number, since 2×57361051821² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 57361051821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57361051801) 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, 9560175301 + ... + 9560175306.

It is an arithmetic number, because the mean of its divisors is an integer number (19120350608).

Almost surely, 2^57361051821 is an apocalyptic number.

It is an amenable number.

57361051821 is a deficient number, since it is larger than the sum of its proper divisors (19120350611).

57361051821 is a wasteful number, since it uses less digits than its factorization.

57361051821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19120350610.

The product of its (nonzero) digits is 50400, while the sum is 39.

The spelling of 57361051821 in words is "fifty-seven billion, three hundred sixty-one million, fifty-one thousand, eight hundred twenty-one".