57208489749 has 12 divisors (see below), whose sum is σ = 82683316716. Its totient is φ = 38116455552.

The previous prime is 57208489733. The next prime is 57208489757. The reversal of 57208489749 is 94798480275.

It can be written as a sum of positive squares in 2 ways, for example, as 38836584900 + 18371904849 = 197070^2 + 135543^2 .

It is not a de Polignac number, because 57208489749 - 2⁴ = 57208489733 is a prime.

It is a super-2 number, since 2×57208489749² (a number of 22 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (63) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57208489649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1862052 + ... + 1892525.

It is an arithmetic number, because the mean of its divisors is an integer number (6890276393).

Almost surely, 2^57208489749 is an apocalyptic number.

It is an amenable number.

57208489749 is a deficient number, since it is larger than the sum of its proper divisors (25474826967).

57208489749 is a wasteful number, since it uses less digits than its factorization.

57208489749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3756276 (or 3756273 counting only the distinct ones).

The product of its (nonzero) digits is 40642560, while the sum is 63.

The spelling of 57208489749 in words is "fifty-seven billion, two hundred eight million, four hundred eighty-nine thousand, seven hundred forty-nine".