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57707935909 = 1312973422569
BaseRepresentation
bin110101101111101010…
…010011100010100101
312111221202122212220121
4311233222103202211
51421141212422114
642302145201541
74112025235051
oct655752234245
9174852585817
1057707935909
1122523697418
12b2263302b1
135598933250
142b162ccc61
15177b3eca24
hexd6fa938a5

57707935909 has 8 divisors (see below), whose sum is σ = 62194942040. Its totient is φ = 53227777536.

The previous prime is 57707935853. The next prime is 57707935913. The reversal of 57707935909 is 90953970775.

It can be written as a sum of positive squares in 4 ways, for example, as 23686133409 + 34021802500 = 153903^2 + 184450^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 57707935909 - 229 = 57171064997 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57707935919) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1694424 + ... + 1728145.

It is an arithmetic number, because the mean of its divisors is an integer number (7774367755).

Almost surely, 257707935909 is an apocalyptic number.

It is an amenable number.

57707935909 is a deficient number, since it is larger than the sum of its proper divisors (4487006131).

57707935909 is a wasteful number, since it uses less digits than its factorization.

57707935909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3423879.

The product of its (nonzero) digits is 18753525, while the sum is 61.

The spelling of 57707935909 in words is "fifty-seven billion, seven hundred seven million, nine hundred thirty-five thousand, nine hundred nine".

Divisors: 1 13 1297 16861 3422569 44493397 4439071993 57707935909