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57388992084 = 22321594138669
BaseRepresentation
bin110101011100101001…
…101000011001010100
312111010112111212020100
4311130221220121110
51420013040221314
642210353134100
74101103245504
oct653451503124
9174115455210
1057388992084
112237a654186
12b15755a330
1355478319a8
142ac5bc7a04
15175d3eac09
hexd5ca68654

57388992084 has 18 divisors (see below), whose sum is σ = 145066618970. Its totient is φ = 19129664016.

The previous prime is 57388992083. The next prime is 57388992091. The reversal of 57388992084 is 48029988375.

It can be written as a sum of positive squares in only one way, i.e., 55644092100 + 1744899984 = 235890^2 + 41772^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57388992083) 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 5 ways as a sum of consecutive naturals, for example, 797069299 + ... + 797069370.

Almost surely, 257388992084 is an apocalyptic number.

It is an amenable number.

57388992084 is an abundant number, since it is smaller than the sum of its proper divisors (87677626886).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

57388992084 is a wasteful number, since it uses less digits than its factorization.

57388992084 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1594138679 (or 1594138674 counting only the distinct ones).

The product of its (nonzero) digits is 34836480, while the sum is 63.

The spelling of 57388992084 in words is "fifty-seven billion, three hundred eighty-eight million, nine hundred ninety-two thousand, eighty-four".

Divisors: 1 2 3 4 6 9 12 18 36 1594138669 3188277338 4782416007 6376554676 9564832014 14347248021 19129664028 28694496042 57388992084