57280958209 has 4 divisors (see below), whose sum is σ = 57731989504. Its totient is φ = 56829926916.

The previous prime is 57280958197. The next prime is 57280958233. The reversal of 57280958209 is 90285908275.

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 57280958209 - 2²⁵ = 57247403777 is a prime.

It is a super-2 number, since 2×57280958209² (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 57280958209.

It is not an unprimeable number, because it can be changed into a prime (57280958269) 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, 225515457 + ... + 225515710.

It is an arithmetic number, because the mean of its divisors is an integer number (14432997376).

Almost surely, 2^57280958209 is an apocalyptic number.

It is an amenable number.

57280958209 is a deficient number, since it is larger than the sum of its proper divisors (451031295).

57280958209 is a wasteful number, since it uses less digits than its factorization.

57280958209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 451031294.

The product of its (nonzero) digits is 3628800, while the sum is 55.

The spelling of 57280958209 in words is "fifty-seven billion, two hundred eighty million, nine hundred fifty-eight thousand, two hundred nine".